Umi Natsukawa is a sincere but hopelessly clumsy new employee with plump breasts, a firm ass, and an exceptional body. Constant scolding from her middle-management bosses awakens her masochistic side and eventually leads to sex with them. As the reprimands, degrading treatment, and training sex continue, her distress turns into pleasure. Covered in semen and trembling from stimulation, she becomes hooked on the sensations and willingly submits as their sexual servant.