Female Teacher: Secret (1978)
Original title: 女教師 秘密
Female Teacher: Secret is a 1978 Japanese-language drama movie directed by Shinichi Shiratori, with a running time of 1h 10m. It stars Miyako Yamaguchi, Etsuko Hara and Jun Aki.
A male high school student becomes obsessed with his teacher and uses various schemes including exposing her philandering husband to have sex with her.