In this adult stepfamily role-play, nurse Kanna marries a divorced man two decades her senior and enjoys a happy life, but worries about his adult son Taichi. After graduating from university, he quickly quit an exploitative IT job and became a shut-in. Determined to act like a responsible mother, Kanna pushes him to find work and lectures him. Taichi resents having a beautiful young woman closer to his age suddenly enter the previously all-male home and boss him around; his anger and pent-up lust erupt, and he assaults her until pleasure overwhelms her resistance.