Exchange no Jutsu Letter

[fencesit]

Hi! Thanks for creating for me, or for otherwise taking a look at my letter. I’m @fencesit.ao3 on AO3! I'm requesting all fic for this exchange.

You may notice that I have less details or prompts for some fandoms/ships/mediums than others. Please don't take this as an indication that I want those things any less than other things! I very much desperately want everything I've requested, I've just had more time to request some things than others.

And: please don't feel like you need to follow one of my prompts to keep from disappointing me. I've provided all the information below in an attempt to help my writer feel confident in producing a gift for me, but if prompts and extra details don't work for you then feel free to ignore them.

I'm up for recursive fic of my own fic or recursive of gifts I've received in the past (assuming you have the author's permission). I'd be open to art treats if you want!

• Do Not Wants
• Likes
• Hoshigaki Kisame/Hatake Kakashi
• Senju Tobirama/Uchiha Madara
• Senju Tobirama/Uzumaki Mito
• Senju Hashirama & Uchiha Izuna
• Hoshigaki Kisame/Senju Tobirama

DNW:

• unrequested AUs (canon divergence is okay; things like modern AUs, A/B/O, or soulmate AUs are not)
• cannibalism or vore
• necrophilia (ghost sex is fine)
• PWP
• sounding
• rimming
• bodily waste
• suicide/suicidal ideation
• vehicle accidents
• detailed or graphic descriptions/depictions of wounds, medical procedures, torture, etc.
• unrequested noncon
• anal tearing or other serious injury during sex
• incest
• sex scenes with underage (under 18) characters
• sickfic
  • specifically: I DNW characters being unwell because of illness and I DNW coughing, sneezing, nose-blowing, and vomiting.
• dissociation, which includes:
  • derealization — An alteration in the perception or experience of the external world so that it seems unreal.
  • depersonalization — The persistent feeling of observing oneself from outside one’s body or having a sense that one’s surroundings/body aren't real.
  • If you're writing a character who's literally having an out of body experience (like, because they're a ghost) or dealing with an actual fake world (like, because they're trapped in genjutsu) then that's okay as long as the situation is clear to the reader, even if the character doesn't know.
• Permanent non-canonical character death
  • anyone can die as many times as you want if it's going to be fixed via time travel or other means.
  • killing OCs is fine!
  • Izuna's canonical death is fine to mention or focus on! Kill him as much as you want as permanently as you want even if I've requested him.
• Boruto content

Likes

Fic likes:

• Canon divergence
• slice of life, canon-compliant fic, missing scenes from canon
• time travel
  • especially peggy sue/with a fix-it focus
  • time loops
  • see my Past Imperfect letter!
• dimension travel (eg from the canon timeline to a divergent timeline)
• worldbuilding —
  • fake/fantasy politics/science and explorations of systems/relationships (eg magic systems, fictional governments or economies, the local gossip network)
  • character backstory, noodle incidents, references to past canon or noncanon events, a sense of history between two (or more) characters
  • vivid/specific details that relate to things like where a character is, what that location is used for, why, and how the character feels about it
• plot
  • casefic/missionfic
  • investigations/mysteries
  • characters with specific goals or problems to solve (finding some treasure, getting a glass of water, murdering their nemesis)
  • monster/murder/crime-of-the-week type plots
• friendship and loyalty
  • the enemy of my enemy is my friend
  • making friends under unusual circumstances
  • A being uncertain of or surprised by how deep B's loyalty runs
  • found family
  • friends reconnecting after being out of contact for a long time
  • signs of familiarity/intimacy, like knowing each other's habits really well or feeling comfortable touching them/being touched in a society where that's notable
• hurt/comfort & angst
  • See my Hurt/Comfort Exchange letter!
  • in terms of physical hurt: sprained ankles, dislocated shoulders, concussions, bruised/broken ribs, broken bones where the bone isn't sticking out, blood loss....pretty much anything non-permanent and not too gorey or with the gore skimmed over.
  • Special mention for Naruto-esque eye loss where it's traumatic and bad but the eye can just be put back in if they find a good medic. That's a great kind of hurt!
  • also as implied by my DNWs I'm not a big fan of sickfic but I love huddling for warmth and hypothermia fic!
  • poisonings and venom are also good — I like a good spout of dizziness or swooning or confusion!
  • in terms of emotional hurt: self esteem issues and unexpected mercy! Special mention for everything below.
  • character convinced no one would help even if they asked (but someone does help!)
  • character convinced there will be no rescue (but there is a rescue!)
  • usually powerful character is helpless due to drugs (and at the mercy of someone they don't trust? :D)
  • cynical/pessimistic/distrustful characters being proven wrong by things turning out better than they could have hoped for — for example: "I could never be loved!" -> Is absolutely loved, "We could never have peace." -> Peace is had
  • aftermath of captivity, torture, rape, isolation, etc.
  • injured character can't complete rescue mission without help from unlikely source
  • lying so that the other will accept comfort or help
  • hands too shaky to complete task
  • forcing exhausted character to get some sleep
• forced (non-sexual) intimacy
  • characters who have to work hard to function in the same space and also characters who don't like each other — see my Hate Exchange letter!
  • handcuffed together
  • sharing a bed because they're safer together than apart
  • captured together, working together in enemy territory
• unconventional formats/POVs
  • 5+1
  • drabble series
  • outsider POV
  • second person POV, especially if it's thematically relevant
  • I'm not really into letters or social media fics, but articles, essays, textbooks, mission/case records, and wikipedia entries are all great.
  • I've never received interactive fiction/CYOA before but I'm down to try it!
  • I'm open to a mix of text and images and I view works with the creator's skin enabled. I do sometimes download my gifts or read them on mobile, however, so I appreciate when unconventional works use tricks like display:none (explained in this tutorial in the "What do I do if the Creator's Style is hidden?" section) which also makes works with HTML/embedded pictures more accessible!
• magic (in already-fantastic settings)
  • curses
  • garbage-tier magical items
  • extra senses
  • worldbuilding around learning/doing magic

Ship likes:

• Anything on my general likes list is excellent in shipfic too of course. Also, I am a pretty big fan of understated shipfic — if you just put the characters together and show that they care about each other then I don't even need kissing or anything, really, which I think can work well for fandoms where characters are frequently in life-or-death situations or need to be professional. Not that kissing isn't welcome! Just, I am extremely easy to please on the "Is this shippy enough?" front.
• Slow burn, friends to lovers, enemies-to-friends-to-lovers — The slower the better. FWB-to-lovers is also great.
• Characters who have history with each other — established relationships are good, but what I really love is feeling like the characters know each other well and think about each other often. In characters who are already friends, that probably looks like, say, knowing what kind of coffee the other person likes. In characters who were enemies, they probably know each other’s weaknesses and faults really well.
• Arguments where each person thinks the conversation is about something subtly different — I mean, misunderstandings in general are great for tension, but I like it when characters are trying to communicate but they’re coming from perspectives so different that they can’t even argue without clarification.
• Casual physical affection — a lot of my ships involve people who have massive or very specific personal bubbles, so seeing the way the characters touch each other when they’re not already in Kissing Mode is really great.
• Pining, especially longstanding they-could-never-want-me pining — the id wants what the id wants and what the id wants is characters with low self-worth. Bonus points if it's tied up in some kind of misunderstanding about their relationship (eg, "They hate me!" or "I'm ugly!") or their differing rank/species/wealth/etc.
• When their hands touch and other very understated moments of romantic or sexual tension — aaaaaaa I don't even have words for how much I love this, if you include it I will wail happily at you about it in my comment, possibly at length.

Smut likes

I don't usually directly request smut but if you want to include it then I don't mind. I know that that's kind of an extremely bland and unenthusiastic way to start out but it's, uh, really honest, at least? I'm usually after character interaction, plot, or worldbuilding with my requests, but getting a sex scene along with other stuff definitely wouldn't ruin a gift. Overall, I want you to feel free to write sex if you would enjoy doing so/if you think the fic will be better with it! I'm generally just enthused by my writer getting to have fun writing something they're proud of, you know? H

There are obviously some things I do like, and I know some folks really enjoy tailoring their fic (i'm one of them!) so:

• Extremely emotionally charged sex — No matter what kind of sex acts they do, I really love when the sex has a lot of feelings involved, especially if it's sad emotions or desperation or part of some hurt/comfort or whump. "Porn With Feelings" is the best!
• Sex that's very directly relevant to the plot or character arcs — I love sex scenes where I learn more about a character or relationship. Is 'character driven smut' a thing? Because if so, that's my favorite. And also porn with plot.
• anal and pegging, PIV, frottage, intercural, handjobs, all kinds of fingering, strapons, toys
• overstimulation and edging, orgasm delay/denial
• bondage — handcuffs, spreader bars, honor bondage, and honestly pretty much anything in the general category of restricting someone's movement during sex
• praise kink, loyalty kink, hurt/comfort, trust and sex otherwise overloaded with emotion
• magic/super powers being used in fun and inventive ways
• clothing/uniform kink, half-clothed sex, one naked and the other not.
• hair petting, cuddling, lazy mornings in bed, touch starvation
• size difference, size kink, come inflation, large insertions
• pregnancy, including mpreg — impregnation porn and pregnant sex welcome, eggpreg and het mpreg are also fine. And while we're talking about it, narratively speaking I love a fic where being pregnant/mpregnant is upsetting because the character didn't plan for it, thinks their partner doesn't want it, conceived in a nonconsensual or dubiously consensual way, can't afford it, etc, all of which could be comforted away with or without sex. I'm not much for birthing scenes.
• for noncon, if i've requested it: humiliation, bruises/rough sex, manipulation, forced feminization (of men or women!), public/group sex, X made them do it
• probably other things that I'm forgetting! I'm pretty open to a bunch of things that aren't on the above list or mentioned in my DNWs, and if you're unsure if you should include something please feel free to ask through the mods.

Art likes

• soft colors, and also specifically moss green and all shades of purple, especially for slice-of-life and domestic pictures
• lineless art and thick lines and messy lines!
• dramatic lighting, especially if the moment is tense or dangerous
• cartoony styles
• realistic styles
• movement and foreshortening
• crosshatching, stippling, visible brushstrokes, and other techniques that let me see what the artist physically did with their pencil/brush/digital equivalent
• that thing where it's all back and white or greyscale except for one (1) color
• art that explores the minutiae of a character's life, like what exactly is on their bookshelf or in their bag

Hatake Kakashi/Hoshigaki Kisame

What I like about this ship is that Kakashi and Kisame have obvious points of tension, but none of it feels particularly insurmountable or personal. I mean, ok, that whole "capturing Naruto" thing is a sticking point, but Kisame never manages it and no one dies (mostly) so them working through it feels interesting rather than impossible. I also think that both of them are people who value loyalty very highly and are, in their own ways, disillusioned with the village system...but obviously have chosen very different paths. Also, Kakashi is a sad dog man and Kisame is a big fighty shark dude and I just love them both?

Also also I guess I will say that I really love ships between dangerous people who have little reason to trust each other, so two extremely strong, suspicious ninja from different villages coming to trust and then even like each other goes straight to my id, and so does any ongoing tension over their loyalties and stuff!

Ship likes:

• I like Kakashi whumped more than Kisame, but either or both is fine
• physical or emotional h/c
• enemies-to-friends-to-lovers or enemies-to-coworkers/teammates-to-lovers
• bottom!Kakashi if you want to write anal (not a deal breaker, just a preference!)
• battle couple
• forced to team up via unusual circumstances
• meeting in captivity

Timelines: In terms of character timelines I'm open to pretty much everything! I really like Kisame as a missing nin and I think his time with the Akatsuki is really interesting, but I also really like Kirigakure worldbuilding and all of the characters associated with it, so something set before Kisame leaves or in a universe where he didn't would be good too! For Kakashi, basically the same thing — I love canon him and I would love canon divergent him — although I'm not very interested in fics where Kakashi is Hokage.

Prompts:

• Enemies forced to work together —
  • Konoha sends Kakashi for a mission where he has to work alongside Kisame and Kakashi can't help but eventually get his teamwork feels all over Kisame. Maybe the mission is prolonged or reoccuring?
  • Captured by a third party or caught in a seal trap; anything where they're in acute, undeniable danger and must either put everything else aside to work together or die.
  • The ninja equivalent of handcuffed together! Like...caught by Orochimaru and experimented on so now they can't be more than [a small amount of distance] from each other? Or something else! I'd just love to see Kakashi and Kisame do some good old fashioned prolonged teamwork. And fall in love. Maybe some kissing. No pressure.
• AU where empathic soul bonds form during moments of extreme empathy — they're not soulmates and they're still ninja, but whoops they feel exactly the same thing at exactly the same time in close proximity to each other and become linked.
• Missing nin Kakashi — Maybe he assassinated Hiruzen like Danzō wanted and Danzō turned around and, you know, labeled him a criminal? Maybe Kakashi is sent to infiltrate Akatsuki instead of Itachi?
• Kakashi saves Kisame — they've been working together for awhile completely professionally but each knowing the other would most likely turn on them under the right circumstances. Kakashi takes the first step, pushing them towards something more, when he refuses to leave Kisame behind even though staging a rescue puts Kakashi at substantially more risk than just leaving him behind.
• Kisame saves Kakashi — I mean, obviously I love Kakashi being the one to instigate, but what would it take Kisame to be the one to stick his neck out for Kakashi?

Senju Tobirama/Uchiha Madara

This ship has just SUCH good potential for tension, conflict, politics, and iddy, iddy goodness. They're from two warring clans! They're at the center in a crazy shift in ideology and warfare! They're both hot! Listen, I could gush about them forever.

I'd love something that explores how hard it is for them to trust each other, especially when vulnerable. Pre-village is fine, or post-village! Have Tobirama kill Izuna, have Izuna die some other way, have Izuna be alive — whatever works best for you! I'd prefer a happy or at least hopeful ending and I want them to have a real positive emotional connection of some kind, but I'm not married to the ideal of them being In Love, you know? Something pre-relationship would be just fine with me.

Tobirama and Madara have a really interesting contrast (eg, Tobirama is logical, keeps his emotions locked down, has a strong leaning towards analysis and systems...and meanwhile Madara is like a big huge hot mess of All The Feelings) and the fact that they were probably raised very differently and definitely raised on opposite sides of a longstanding conflict is hella good. Their thoughts on the village, their approaches to problem solving, and even probably their very fundamental belief systems are extremely different and that's the kind of thing that can lead to really interesting tension. What they do have in common (Hashirama, losing brothers, wanting to protect their clans, each at some point in some way genuinely believing in Konoha, probably PTSD from the whole child soldier thing) makes for an interesting foundation to build a relationship.

Ship likes:

• either or both whumped
• physical or emotional h/c
• enemies-to-lovers or enemies-to-friends-to-lovers
• forced intimacy (nonsexual or sexual!)
• bottom!Tobirama if you want to write anal (not a deal breaker, just a preference!)
• Izuna as an antagonist (including Izuna nonconning Tobirama and/or trying to murder him, although he doesn't have to be that antagonistic)
• Either or both of them being socially isolated from their respective clans
• Either or both of them having poor marriage prospects despite their status/power

Timelines: I definitely like things set before the village comes together, in AUs where Izuna lived to see the village come together, or in relatively canon-compliant situations where Tobirama killed Izuna. Or Izuna died in some other way! Or the village never came together! The world is your oyster. I'm somewhat less interested in anything set after Madara leaves the village, but only because I like happy endings; if you think you can make it work please go for it.

Prompts:

• Enemies forced to work together — hired by the same very rich or important person. Maybe even the Daimyō? Someone who can afford to have them both work for him and who Tobirama and Madara can't afford to piss off. Maybe they have to sleep in the same room. Maybe they have to fight for their lives back to back. Maybe one of them needs to be rescued, or protected, and the other one steps up to do it because of their joint connection to Hashirama. Maybe, somehow, there's some identity porn.
• AU where empathic soul bonds form during moments of extreme empathy — they're not soulmates and they're still ninja, but whoops they feel exactly the same thing at exactly the same time in close proximity to each other and become linked. Maybe both of them accidentally yearn for the village to be true. Maybe both of them see Hashirama die/almost die. Maybe
• Arranged marriage — Hashirama decides that Tobirama should marry into the Uchiha to seal the peace. Or, maybe, decides that a Senju should marry an Uchiha and then is very surprised when Madara actually wants Tobirama. Maybe Izuna is dead and it's a really rocky road to getting the ship together. Maybe Izuna is alive and hating every minute of this. I'm okay with Madara and Izuna sharing Tobirama in the most awkward spouseshare EVER if you want, too, but it's definitely not necessary. Just an option! For added tension! And maybe a marriage night threesome.
• Levirate marriage — Tobirama was in an arranged marriage to Izuna (which was a terrible idea) who is now dead (which Tobirama definitely wasn't involved in, he promises) and now the marriage defaults to Madara.
• Timeloop — One of them is in a timeloop and takes forever to ask the other one for help, and then maybe takes forever convincing the other one to help. Either or both of them in a time loop that has something to do with Izuna's death. Or: Tobirama has been looping for as long as he can remember and he's so tired, tired enough to finally refuse to fight because nothing else has worked.
• Huddling for warmth — While visiting a cold climate — the mountains between Land of Fire and Land of Lightning? The northern, mountainous stretch of the Land of Wind? — one of them saves the other from freezing to death.
• Taking a mission together — After the village comes together,an Uchiha child goes missing and Tobirama and Madara have to work together to find and rescue them.
• Bloodline thieves — Bloodline theives make AMAZING antagonists, especially for pre-village stuff, because they can make these two work together :D so anything with them would be great. People trying to steal the Sharingan from Madara is obvious, but I'd also take bloodline thieves capturing Tobirama under the mistaken assumption that either A) he has the mokuton or B) his red lines are a powerful bloodline. Or maybe the aftermath of Tobirama rescuing Izuna from bloodline theives and Madara is ssssoooo thankful? :D :D :D
• Fem!Tobirama welcome — I like my female Tobirama just as sharp and analytical and powerful and controlled as my male Tobiramas. "Tobira" or "Tobirama" works for me. A female Tobirama who's publicly pretended to be male is also welcome!

Senju Tobirama/Uzumaki Mito

I started thinking about this ship because it was nice to imagine Tobirama getting to be with someone who shares his interest in seals, and it seems like a nice direction to go to explore Mito's character! And the more I thought about it the more I wanted it, especially because of the delicious potential for misunderstandings and drama and tension.

When it comes to dealing with Mito's marriage to Hashirama, I am okay with (but don't kink on) infidelity, or Hashirama could be dead (earlier than in canon or otherwise), or Hashirama could be gay for Madara, or Hashirama and Mito could have an open relationship, or Hashirama and Tobirama could both be married to Mito at the same time. Or whatever! Live your dreams.

Timelines: Before Mito comes to the Senju, after Mito comes to the Senju, pre-village construction, post-village construction... I have no preferences although it'd be nice if Mito and Tobirama could be 18 or older. Don't be afraid to make them much older, like during Tobirama's tenure as Nidaime!

Things I'd like to see explored about Mito:

• Did/does she want to get married to Hashirama? Did/does she want to get married at all?
• How does she feel about the village before/during/after its construction? Who first told her about it? How much did she help with its construction?
• Does she miss Uzushiogakure? Does she play her part in clan and international politics?
• How hard is it for her to become adjusted to living with the Senju? How hard is it for them to become adjusted to her? Do her expectations line up with reality?
• How does Mito feel about the Uchiha?

Things I'd like to see explored about Tobirama:

• How does Tobirama feel about having another accomplished seal master around? Has he ever had so much opportunity to talk about seals before?
• Do he and Mito use the same kind of sealing (maybe Tobirama was taught by the Uzumaki/from Uzumaki materials?) or do they use different sealing techniques (like maybe Tobirama is self-taught?)?
• Does Tobirama desperately want a relationship but think he can't have one? Does he think he doesn't want one until he meets Mito? What do other people assume he thinks about sex/romance and are they right?
• If Mito isn't a kunoichi (or, hasn't frequently fought/taken missions) how does Tobirama feel about being involved with her? — does he consider her vulnerable despite her sealing abilities?

Other Prompts:

• AU where empathic soul bonds form during moments of extreme empathy — they're not soulmates and they're still ninja, but whoops they feel exactly the same thing at exactly the same time in close proximity to each other and become linked. Grief over Hashirama would work, but connecting over something else would be great too! I'd also be interested in seeing this link grow slowly as they become more in sync instead of snapping into place suddenly — a manifestation of their emotional intimacy that they can't ignore.
• Sex pollen — Tobirama comes back from a mission sex pollened (or drugged-in-a-conveniently-sexy-way, or chakra-sick-in-a-conveniently-sexy-way, whatever) and Mito steps up to help him out.
  • Maybe it's conventional for married-in wives to help their brother-in-laws like this, maybe it isn't.
  • Maybe Hashirama suggests it or maybe he's off on important business and the decision falls completely to Mito.
  • Maybe Tobirama is relieved and grateful, maybe he fears Hashirama's wrath. Maybe it has to be Mito because no one else is willing...or maybe it doesn't have to be Mito but she insists.
  • I'd prefer Tobirama to end up really into the sex even if he doesn't start out that way.
  • I'm way more interested in guilt on Tobirama's part for fucking his brother's wife than I am for guilt on Mito's part for sleeping with someone other than his husband, but I'll take both or either!
  • Femdom absolutely welcome.
• Arranged marriage — I’ve always assumed that Mito and Hashirama’s marriage was arranged and also that Mito probably had a super expensive bride price.
  • Maybe Tobirama’s mission pay over the years has mostly gone into the fund to get Hashirama a good wife? Maybe the Uzumaki find this out and Mito thinks she gets to pick between Hashirama and Tobirama? Maybe Mito finds out that that's why Tobirama isn't so much as engaged even years later?
  • Mito accidentally falls in love with Tobirama during her engagement to Hashirama, something which Tobirama is maybe 100% oblivious about. She has to move carefully to switch her arranged marriage from Hashirama to Tobirama without insulting the Senju.
  • Hashirama is busy with something so Tobirama is sent to pick Mito up and escort her to the Senju/the wedding venue. Mito spends the whole trip thinking Tobirama is her husband-to-be.
• Levirate marriage — Since Mito’s bride price was so expensive/the Uzushio–Senju is so important, Mito isn’t allowed to go back to Uzushio if Hashirama dies or divorces her. She has to be married to a Senju, maybe one as closely related to Hashirama as possible. I would enjoy pretty much any variation on this, including but not limited to:
  • Mito and Tobirama are forced to marry and both think it will go terribly, but grow to like each other
  • Mito picks Tobirama as the best out of what she thinks are a lot of bad options
  • they’re drawn together by shared grief
  • one of them has been silently in love with the other, or they’ve both silently been in love with each other, and now they finally have a chance to confess their feelings and be together.
• Fem!Tobirama welcome — I like my female Tobirama just as sharp and analytical and powerful and controlled as my male Tobiramas. "Tobira" or "Tobirama" works for me. A female Tobirama who's publicly pretended to be male is also welcome!

Senju Hashirama & Uchiha Izuna

Izuna was so against peace and so unwilling to trust Hashirama that he literally died for it so I would LOVE to see him be Like That with Hashirama. Maybe they do a sort of enemies-to-friends thing where Izuna realizes he's wrong...or maybe Izuna remains staunchly certain that Hashirama is his enemy! I would honestly enjoy either. Overall any kind of focus on how terrifying Hashirama is to other ninja/Izuna in particular would be wonderful, as well as any look at the sort of general suspicion and caution required in the warring clans era! Like, is it hard for Hashirama to trust Izuna? Is helping Izuna a difficult choice, despite Hashirama's dream?

I would enjoy anything from Hashirama and Izuna becoming friends despite Izuna's best efforts to Hashirama having to injure or kill Izuna for the sake of the village, so really go where your heart takes you!

Timeline: Pretty much anything would be good, pre- or post-village founding, but I usually like for characters to be 12 or older just because I don't find children very interesting to read about? On the other hand they're off being child soldiers at that age, so maybe it'd be good! I trust you.

Prompts:

• Okay hear me out Hashirama rescuing Izuna from people trying to steal his eyes.
• Or both of them captured and having to escape together.
• Izuna could be injured and Hashirama could heal him whether he likes it or not.
• Hashirama defeating Izuna in a fight or capturing him and izuna being surprised by how well Hashirama treats him/by Hashirama keeping him alive at all.
• Any situation where they have to collaborate.
• Any situation where Izuna is forced to trust/rely on Hashirama or has to worry about Hashirama taking advantage of some weakness.
• ...sorry this is so short! I've basically just requested it for two freeform exchanges so I don't have a good prompts list built up yet. You can read the Gen Freeform Exchange prompts here and the Hurt/Comfort Exchange prompts here.

Hoshigaki Kisame/Senju Tobirama

(Brief note — I added this ship really last minute, so this is formatted a little different from my other ships because it's taken straight from my Past Imperfect letter. I hope you find something of interest in it, though!)

I guess why I like the idea of this ship is that A) it's blatantly nonsensical, honestly, it's delightfully ridiculous but B) I think if it were taken as seriously as possible and an earnest attempt was made a really really interesting fic could result. Kisame has a lot of Opinions about a village system that Tobirama more or less built, and I think that that could lead to some EXTREMELY interesting interactions. Plus, you know, Kisame's main contact with Konoha is through Itachi which means his has an incredibly different POV of it compared to most characters who typically meet Tobirama via time travel.

I don't mind mentions of past Kisame/Itachi and I have a very very low bar for what would be "shippy enough" for a weird ship like this. In fact, honestly, I would be pleased with gen interactions between them, too, so do that if you want.

• Mental Time Travel to Past - Replacing Past Self — ...yeah, okay, this freeform doesn't make a whole lot of sense in the context of this pairing because obviously these two were never alive at the same time. But I guess with a really generous definition of "past self" you could have Kisame like, wildly overshoot his attempt to peggy sue and end up in the body of his pre-village incarnation.
• Trying To Change The Timeline By Preemptively Killing Someone — I'd love to see Kisame go back to the past to try and kill Madara. Or Danzō, assuming he's learned about the Uchiha Massacre.
• Peggy Sue - Time Traveling Character Goes Back to Saved Loved One — Kisame trying to save Itachi by inserting himself into Konoha extremely early/killing Danzō/you know, whatever.
• Time Travel Fix-It - Altering Canon or Backstory — Maybe Kisame thinks the villages never should have been made, or the bijū never captured?
• Time Travel Fix-It - Altering Non-Canonical Disaster — I have a deep love for the Naruto time travel standard "everyone but me died so I came back in time to make sure things go differently this time" trope and the idea of it all being on Kisame to fix it is GREAT because he's like the last person anyone would pick but I believe in him. Maybe, if you want, Tobirama remembers being edo tensei'd or something, so they're in this together?
• Outsider POV Of Time Traveler(s) — I would love Tobirama's POV of Kisame.