fun fact about togame, his voice actor also voices a jojo character named "Weather Report" (you see where i'm going with this?)
i want to believe that the one singular contact number in sakura's phone is not in fact his piss poor attempt to use a phone, but rather a well-kept secret point of contact between him and one certain togame jo. after the showdown with shishitoren and the rooftop celebration, togame and sakura remain... curious about each other. it starts off surface-level enough. togame wants to find a way to repay his debts somehow -- keep an avenue available to someday prove to sakura that he isn't so lame anymore.
he's eternally thankful to sakura for snapping him out of whatever fugue state choji's mistakes put him in and wants to actually befriend sakura because of it. make sure he hasnt changed and all. meanwhile sakura contemplates it, because umemiya WAS right in the grand scheme of things and he did somehow "communicate" with togame in their fight. he wants to keep talking to togame, sort of. learn all the things he couldn't gather with his jabs and kicks. so they both find themselves at the tunnel a few days after the fight as complete coincidence.
its complete fate they ran into each other without meaning to, but togame wastes no time in warmly greeting sakura and chatting him up. night begins to creep up and at that point sakura knows they've gotta start getting home if they both don't wanna start shit sitting out at night on territory boundaries while wearing their respective recognizable uniforms. he's hesitant to pull away from the conversation though and togame seizes the opportunity to ask for sakura's (barely used) phone and write himself into sakura's contacts. (he doesn't even have a password btw)
"Wow~ Not a single person on here, Othello-kun."
"Hah? What th' hell would I even need it for? If I need something, I can just go ask in person. None of that slow, boring texting crap."
"You really live life too fast, haha. What if it's too small for the effort? Or you can't come find me in time? Shishitoren territory is quite far from Furin's campus, after all."
"What would I even need'ta ask you that isn't urgent enough to come here, scraggly?"
Togame simply laughs under his breath. "Anything you can think of." he hands the phone back to Sakura, screen lit up with a single new contact under the name 'Weather.'
The older boy continues to tease Sakura. "Call me to ask about the weather, if you really can't come up with anything at all. I promise I'd pick up; it's the least I can do for you after everything."
They part ways, and even if neither of them mention it -- Sakura keeps this encounter close to his chest. Thinks about it when his classmates make fun of him for it the very next day, even as he says nothing and lets them tease him. With 5 new names in his list of contacts, he remembers to go home and scroll to 'W' and asks about the weather tomorrow. Asks a whole lot of other things too. All until he falls asleep.
(He never changes Togame's contact name after that. Not even months later, stranded on a bridge and staring down an army of enemies and another black-haired tall douchebag to humble. What will the weather be like tomorrow? Clear motherfuckin' skies, baby.)