Natsumi Sasaoka, 40, is a mother of two who has worked as a web designer for a subcontracting company of the production firm she once worked at during her single days. While her daily life is fulfilling, after 14 years of marriage, a lingering doubt remains deep in her heart: "Have I ever actually had sex with someone I'm truly compatible with?" Including her husband, she's only been with two men. Despite having an extremely sensitive body that trembles even at her own touch, she's never experienced wild, uninhibited sex like an AV actress. To confront this truth, she has begun a new journey. Witness the documentary of a 40-year-old married woman as she takes a third cock in her life and finally achieves complete sexual fulfillment.