Teacher,...

Once a week, Shiratori, a high school teacher, goes to be embraced by a younger man. He has always lived his life striving to "avoid making mistakes" and "be right." However, no matter how much he believes he is acting correctly, his heart only becomes more tormented.

But there is one thing that Shiratori knows is wrong, yet he just can't stop doing. That is—sleeping with his former student, Kanzaki. He can't forget the pleasure that Kanzaki gives him, the pleasure of having his sense of righteousness shattered, and he can't leave him even if he wants to. But one day, he hears a rumour about Kanzaki at school...?
[via Renta]

Original Japanese: Renta,
CMOA