Mother Yuu discovers that her son's best friend, Tsutomu, is still a virgin, and her long-suppressed desires begin to transform into an overwhelming craving. Her daily restraint reaches its limit, and her sexual instincts grow stronger by the day. Yuu's desire to possess Tsutomu's cock evolves beyond mere curiosity into a deep, intense passion. However, her aggressive, predatory techniques as a sexually dominant mother are too much—he climaxes within minutes. Unable to bear the shame and humiliation, Tsutomu flees the scene, leaving Yuu shocked by his reaction. That night, Yuu appears in Tsutomu's dreams, awakening entirely new emotions within him.