Sensei Wa Ikenai ××Nist summary:

Me or the di***, which do you prefer? A dramatic love between a younger, muscular P.E. teacher and an older Japanese teacher with a secret. One day Mr. Fuji confiscates a student's smartphone and is captivated by the man masturbating with a di***. Later, he checks again and sees the man wearing something surprisingly similar to his coworker, Mr. Sasame! Mr. Fuji devises a plan to discover the truth, and when he does, loses control and forces himself on to him! Can the two wrestle with their hidden desires and their budding feelings?