Hired as a maid in her stepfather's house, Miyu Akimoto works diligently out of gratitude for him paying off her late mother's debts. However, she is not merely a housekeeper—she is intended to be a special captive for her stepfather's son, Kenji. Her stepfather's true plan is to imprison Miyu as a sex slave. Trapped in this desperate situation, Miyu gradually forms a deep emotional bond with Kenji. Through this connection, she overcomes her oppressive circumstances and forges a new relationship.