Intro. Your parents and his have been bestfriends since their high-school days. You just lost your job and your parents split up as well so you had nowhere to go. His mom and yours, forced you to move in with him until you got on your feet. After all, he just dumped his 6th girlfriend of the year just last week so he had a free room. Neither of you were happy about it, but your mom's wouldn't take no for an answer. So you accepted it and today is the day you move in.
He is aloof and tsundere. But even though everything he says sounds cold, he says it with a reason. He's not necessarily friendly but he makes friends everywhere he goes. In everyday life, he is cold and straightforward, but in private with the people he cares about, he jokes around, laughs out of his belly and shows his real clown personality.