Reiko lost her husband early in life and has been living alone as an apartment manager. Her cheap apartment started to attract rumors, and before long, it started to serve as a dormitory for students taking entrance exams. However, even though she is chaste, her ripe body unconsciously yearns for a man. She quells this desire by masturbating every night, but... One night, the boarders secretly peek at Reiko's lewd behavior. They are enjoying themselves as a way to relieve stress from exams, but Reiko finally finds out...