Female Teacher: Hunting (1982)

A teacher and two students engage in a taboo dance in the Nikkatsu "Roman Porno" Female Teacher: Hunting (1982). After discovering her student Midori (Kyoko Ito)'s uniform floating in the school pool, teacher Sakatani (Yuki Kazamatsuri) confronts her classmate Daisuke (Hajime Ishigami) and accuses him. He's innocent of this particular offense, but the accusation leads Daisuke to actually commit a crime against Midori in front of the entire school before skipping town. Fast-forward a few months, and Sakatani is summering at the beach when she discovers Daisuke is hiding out in the same town. Then Midori also inexplicably shows up, and as they do in Nikkatsu movies, things get pretty steamy. If you're Hunting for Yudai Ishiyama and Hajime Ishigami naked, then search no more, because both bare butt (and blurred out dong) in separate sex scenes. Bullseye!