All roles are played by adults. Maiko cooks a homemade meal for Kosuke, a friend her adult son brings home after sports practice, and notices him stealing glances down her top. Later, the sight of his thick cock turns her on, and she playfully decides to have a taste. She treats the encounter with her son's friend casually, but Kosuke becomes addicted to pleasure unlike anything he has known and keeps demanding more. His relentless, hard pounding eventually pushes Maiko's body beyond its limits.