Compressed timeline AU where the Hokages retire younger instead of mostly dying (Minato still kicks the bucket, sorry man, should have called Hashirama to deal with Kurama instead of trying to tackle it yourself) and you just have them wandering around the village when Naruto's growing up
Bonus points for Kakashi's mom being a Senju so he ends up adopted by Tobirama. Hashirama would have volunteered but he already has Tsunade and Yamato and Mito said they weren't taking any more.
Kagami Uchiha/Tobirama Senju is a thing and Madara's still pissed about it
Madara's homophobic repressed gay
Hashirama is a useless bisexual who's absolutely crushed that Madara "hates" him
Naruto and Sasuke had screaming matches at the academy about who was going to get to be taught by the Shodaime and were both *terribly* disappointed with Kakashi, until Kakashi took them to a family dinner and they realized Hashirama is very powerful but can't teach to save his life
Kagami used to be terrified of his cousin but by now he's just like *bitch, at least I had the guts to marry the guy who kicked my ass and made me fall in love with him, fuck off*
Tobirama and Madara fucking hate each other and will leave family dinners if the other is there
Sasuke fucking hates Tobirama and Kakashi by extension until Kagami sits him down and is like "Madara's an idiot let me tell you why" "he's our clan head!" "do I look like I give a fuck-"
Sakura low-key loves Tobirama's work but she pretends to hate him at first because Sasuke does. Tobirama never quite respects her for that but after the Character Development where she learns to do things for herself he might teach her a few things if Tsunade asks.
People still keep ripping off Tobirama's jutsu and forgetting he invented it and yes he's still salty about it
He and Orochimaru got along very well before Orochimaru left the village
Naruto was upset at first but later if Tobirama scolds Kakashi for reading Icha Icha when he's supposed to be teaching this 12 year old is 1000% ready to throw down with the Lord Second for being mildly disrespectful to Kakashi-sensei
Kakashi is mildly embarrassed. Tobirama is vaguely nonplussed. Kagami is laughing so hard he can't breathe.
Shisui still dies but Kagami finds out and grabs Itachi and he and Madara get a confession out of him and killing Danzou is the only thing Madara and Tobirama have ever agreed on. They hate it but Tobirama still tells Hashirama to shut up when Madara lights Danzou on fire. It goes a ways towards the younger Uchiha stopping calling him the White Demon of the Senju.