Reiko Makihara is a widow who lost her husband early and has been living alone as an apartment manager. Her low-cost apartment gained attention and gradually turned into a dormitory exclusively for students. Despite her role as the landlady, her mature body unconsciously attracts the gaze of young men. She tries to suppress her desires by masturbating every night, but one evening, her tenants secretly spy on her erotic acts. What began as a way for the students to relieve exam stress turns into something uncontrollable when Reiko discovers them, leading to unexpected developments.