Nanami witnesses a shoplifting at an obstacle convenience store where she works part-time. However, an obstacle culprit is her stepson's classmate, who frames Nanami and get her into a trap. He roused by Nanami's voluptuous body, a lot humiliates her with his friends. Nanami endures escalating demands. However, her humiliation turns into pleasure," and her kind-hearted mommy is reduced to a coitus slave at an obstacle mercy of a short boy.