Mina is living a peaceful married life with her beloved husband. One day, she ends up hiding her husband's best friend, Kawagoe, a scumbag who repeatedly commits theft and fraud. Naturally, Mina hates Kawagoe, but her husband tells her, "We grew up in the same facility, and he's like a family to me, so I can't just leave him alone," and she has no choice but to live with him... A few days later, when her husband goes on a business trip, Kawagoe takes over Mina's house and her body as if they were his own. And so begins her days of being made to cum by the dick of the man she hates so much...