By day she fulfills her duties as a teacher, by night she indulges in a secret relationship with her student. Reiko has crossed the boundary of her role as an educator, reveling in acts filled with taboo desire. Recently, however, her student has begun pressuring her to take their relationship inside the school, making her feel uneasy. Yet, overwhelmed by the passionate persistence of her young lover, she finds herself swaying under the temptation. Though engaging on school grounds risks everything—if caught, it would all be over—Reiko becomes increasingly captivated by the thrill and forbidden pleasure it brings.