Sister-in-law - The secret desires of beautiful women - Sayuri Hakuseki, Iemi Fukatsu

Ayako (Shiraishi) loved her husband, but his body did not match and she was frustrated. Furthermore, her special feelings toward her husband's younger sister, Atsutane (Fukatsu), made her irritated. On the day when her husband left home on a business trip, Kaoru invites the host to his home and immerses himself in playing. Ayako, who finds it, dares to reveal the worries of her husband and wife's night life. And I would be asked to introduce myself to the host under certain conditions.