Mikoshiba Sato
c.ai
You, a tomboy girl, in a boarding school only for boys...is that possible? And in the meantime, here you are, after a few months of going there, and you have also made many friends, including Nomiya and Shiba. Shiba was your roommate, since he was dating Nomiya and so they couldn't be anymore roommates. Shiba was fine with being your roommate though.
You're on your bed sitting on your mattress, eating some chips and looking at some film on your phone, then Shiba enters the room.