Backstage de Aimashou

Shuuma Takatsu is a young rookie actor quickly rising in popularity. After a night of drinking, he wakes up one morning to a naked man next to him with no memory of what had happened?! That naked man turned out to be the talented actor, Motoi Shiozawa! To make things worse, now he's going to be Shuuma's new co-star!

(Source: Frontier Works, translated)

Included one-shot: Ore no Sensei