Aisaretagari no Mesu Oji-san - Toshishita Wanko no Shuuchaku Sex

Sakai, a middle-aged gay novelist who used to be a teacher, saves Ao, a handsome college student, from getting entangled with a stranger. Ao asks him to return the favor and they end up having a drink at a bar. Their bed compatibility is perfect, but can Sakai, an asshole-magnet who's afraid of commitment and Ao, an oversized puppy who fell at first sight, go on together?