One day, mother Ikumi discovers that her son Koji is being bullied and desperately tries to protect him. However, she is threatened by the bully Ikeda, who forces her to undress in front of her son. To protect Koji, Ikumi submits to Ikeda's demands. She endures having her masturbation filmed and being persistently fondled. Yet, as it continues, she gradually begins to feel pleasure from the forced encounters. Before she realizes it, Ikumi finds herself wildly thrusting her hips in ecstasy.