Chikan densha: Hitozuma stalker (1997)

Original title: 痴漢電車 人妻ストーカー

Kyoko stands in the kitchen. Then her husband Kyoichi comes back. Jealous Kyoichi pursues his wife's behavior today. She always has sex out of jealousy and delusion. Kenta, who works as an assistant at a university, is stressed by not being able to get promoted and being adopted by his son-in-law, so he ends up having sex on his way home by train. That person is Kyoko...