Working as a female college student volunteer in home care, she becomes entangled in a taboo affair with her elderly clients. Though she is in a romantic relationship with her agency manager, everything changes when he catches her performing masturbation in front of an old man during a visit. Enraged, the manager harshly scolds her. The shouting draws the elderly man to the scene, where he bursts in and tearfully thanks her. After that incident, the bond between the old man and her grows deeper, evolving into an increasingly intimate relationship.