"They were roomates" obkkrn au where obito and Rin are an established couple who live together. And bc reasons, Kakashi needs a place to stay for a while. So obviously, yk, Kakashi comes to stay with his besties as he looks for a new apartment
What follows is a comedy of errors as Rin and Obito proceed to be absoloute fucking freaks about Kakashi. They are throwing themselves at him in increasingly desperate, concerning, and honestly at times kind of creepy tactics.
Kakashi makes them dinner as thanks and Rin makes a joke about how he should stay forever and be their housewife and Obito laughs just a little bit too hard (under the table he's clutching at his thighs so hard they're gonna bruise)
Kakashi's clothes begin to go mysteriously missing and Obito starts not to subtly suggest he just borrows his instead :))) as Rin is going "oh Kakashi you're soooo forgetful, it really makes me worry about you, you know... Maybe you just need someone to take care of you, there's no shame in that! Teehee <3"
Kakashi gets sick and Rin very seriously considers giving him fake medicine so he can stay sick (and under her care) longer
Kakashi complains ab how expensive housing is and how he can't afford any of this shit on his salary, and Obito "jokes" a little too enthusiastically that he should just quit his job and find a hot sugar daddy. Or something. Wouldn't that be funny. Right Kakashi? Right? Right? Hey, you know Obito himself is pretty wealthy ahahahaha—
Kakashi remains completley oblivious.
Genma comes over for dinner one day, and at that point things have escalated so much that several of the weird comments and behaviors on Obito and Rin's side are the new "normal." So Genma just sits there through, what is from his perspective, the weirdest and most uncomfortably charged dinner of his fucking LIFE.
When he leaves, Genma just puts a hand on Kakashi's shoulder and tells him good fucking luck. Kakashi remains confused.
Uhhh endgame Genma tells Kakashi to open his fucking eyes bc Obito and Rin want him BAD. And after the initial disbelief, Kakashi begins to test the waters of leaning into/indulging in Obito and Rin's newest freak behavior and seeing what they do
And just Kakashi subtly fucking with them both by playing into whatever the fuck is happening in their heads, just to see what happens. He's thriving actually
Anyways I'm coming to learn that my favorite obkkrn dynamic is just.
Obito 🤝 Rin -> being freaks about Kakashi together
To be fair tho: it's REALLY funny. And also makes total sense.
Because ofc Nohara "Obito apologist even in death" Rin, and Uchiha "Rin was a perfect angel who I will put on a pedestal till my dying day and destroy the world in the name of creating a new world she could have been happy in" Obito would make eachother INFINITELY worse!!
Obito is incapable of seeing his own or Rin's possible wrongs, and Rin literally was on Obito's side even through the genocide, Kakashi stalking, child murder, detailed plans to take over the world, etc. There is no way in hell these two could actually ground eachother, sorry. In my eyes they would only make eachothers freak factors infinitely worse.
Every time either one of them gains even a SHRED of self-awareness, the other is right there to comfort them and insist that "nooo ur soooo normal, I promise <33" and "its ok if you're a little bit of a (stalker, murderer, obsessed with Kakashi) freak... it's not ur fault u have ptsd..."
Rin and Obito both suffer from the Kakashi Illness(tm) but it presents itself in different ways and they feed into eachothers fixation on the guy in the worst (best) ways