Little, Brown Book Group Hirano and Kagiura, Vol. 1 (manga)

Basketball players. Bad boys who aren't really bad boys. Roommates. Senpai-kouhaiBL romance. It all started when Kagiura moved into the school dorms with whatseemed to be a bad-boy upperclassman. But after he's left in the tender care of hismother hen of a roommate, Hirano, it's too much to ask for Kagiura not to fall inlove...right?!