Riko Miyase begins working as a housemaid at a private estate. The household consists of a father and his eldest son, and as a live-in servant, Riko soon becomes entangled in their lewd advances. Forced into sexual servitude by both men, her only solace comes from the younger brother, Yusuke. He sacrifices his own body to satisfy the master of the house and the eldest son's desires. As Riko grows closer to Yusuke, their bond deepens—but will their love ultimately prevail?