Itazura Neko Ni Goyoujin

Itazura Neko ni Goyoujin : Toshiya takes in his former teachers unruly son, Tetsu, as a favor after Tetsu gets into some trouble with the mafia. Tetsu does everything he can to get Toshiyas attention, including having sex in his room, bringing home random guys, and molesting Tos