I will never leave you..again

John goes on a 'private' school named baskerville institute. When ,suddenly on a pretty normal day at chemistry, a new guy starts in his class.

okay, it will be about Sherlock and John, of course, and they are fifteen years old. John lives in room 221c, but was kicked out of it by his old roommate, who wouldn't share the room with him. He had to move to the dorm next to his old, 221b was the room number. his new roommate was the new and mysterious guy, Sherlock.