[The comics] Hokenshitsu Ni Wa Kedamono Ga Iru [Amenbou] 保健室にはケダモノがいる

Hokenshitsu Ni Wa Kedamono Ga Iru [Amenbou] 保健室にはケダモノがいる
The massive asses of the perverted nymph students affects the libido of the health physician. He tries really hard not to act upon his boner. Later in the well-animated hentai, we see one of the students going for the teacher and he is not able to resist her. They are having sexual intercourse in multiple positions.