Love Bites Back (1988)

Sinopsis

Yuichi Koga is an upper-class business executive, running his own adult video company, and living a successful life with his wife and daughter. Outwardly, his family seems really happy, but in reality Yuichi enjoys sex with everyone but his wife Chikako. One day, he gets a phone call from a woman named Sanae, an old elementary school classmate of his.