[ Room 402, right, right. Ryohei takes the time to chuck his bags onto the bed and look around the room for about two seconds. And then takes the time to hang half out the window, because dude, he's on the fourth fucking floor and this is extremely high, and he kind of considers jumping out it, which would be extreme, except then he would probably break his legs and then he wouldn't be able to box properly (it's not just fists, it's a full body movement! You gotta throw all your weight into a punch!) and that would be really unextreme, so he pulls himself back inside.
And then he leaves his room because really, there aren't any people in there. Or punching bags. No people and no punching bags means there's pretty much nothing to do. And besides, might as well get a headstart recruiting people for the boxing club, right?
He goes to the first floor first, because hey, freshmen! (But maybe you came across him running down the stairs [at a speed that really isn't safe, but it's extreme training, so it's okay!] or something before he gets there, if you aren't on the first floor?) ]