The fûfu kôkan: Hoshigaru tsumatachi

ザ・夫婦交換 欲しがる妻たち

Also known as 人妻淫乱パーティー 相互不倫, Hitozuma inran party: Sôgo furin, Za fûfu kôkan: Hoshigaru tsumatachi, 今夜、妻が浮気します, Kon'ya, tsuma ga uwaki shimasu

Takashi is a man of extraordinary sexual prowess who cannot be satisfied without having sex with his wife Akiko before going to work. He also has a relationship with his sister-in-law, college student Yoshiko, who comes to visit while his wife is away. His next target is Etsuko, a young wife who lives next door and whose husband works at the same company as Takashi.