A mother named Yumi visits her son Kazuya at his share house after he left home for college. However, she finds that Kazuya has stopped working and instead treats his roommates Sawaki and Suzuki to homemade meals. As they become increasingly aroused by Yumi's uninhibited erotic presence, they give in to their desires and force themselves upon her while she's drunk. Overwhelmed by the sensation of being taken against her will, Yumi rediscovers the pleasure of being violated. In the heat of the moment, she finds herself taking control and riding on top of them, losing herself in the carefree sexual encounters with her son's classmates.
