Newlywed English teacher Tomoka lives apart from her husband, who is working in another city. She works late every night and always carefully locks up before leaving home. One evening, as she is about to leave school, she notices her top student, Tanaka. His gaze is different tonight—intense, animalistic, filled with desire for her body. Overpowered by his presence, Tomoka resists at first, but gradually begins to feel pleasure as her body responds to his desires. Their relationship takes a dark, unexpected turn as she is drawn deeper into his control, becoming his sex slave and cumdump.