Umi Natsukawa is a sincere but hopelessly clumsy new office 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 sexual relationships with them. As their harsh reprimands, degrading treatment, and training sex continue, humiliation turns into pleasure. Covered in semen and trembling from intense stimulation, she is conquered by the sensations until she willingly submits as their sexual servant.