New caregivers China and Sana are caring for the elderly residents of a nursing home under the supervision of Headmaster Haga. However, the elderly residents find it their purpose in life to commit obscene acts of sexual harassment against the new caregivers, and the acts are done with Headmaster Haga's permission, with Sana participating in the sexual harassment. The two, who don't want to quit being caregivers, end up being used as toys by the elderly residents and engaging in an orgy...