Haruka is a beautiful married woman. Recently, her husband has been coming home late and not eating at home, and he hasn't had sex with her for a long time. She was even more sure when she smelled the women's perfume on her husband's shirt and the voice of a woman calling for a divorce from him. She told herself that everything was fine, her husband would know how to return to their home. But she was really very lonely, her long-unsatisfied sexual desire accumulated more and more, making her have to masturbate herself to dispel some of the feeling of emptiness in her heart. She didn't know that all her actions and expressions were seen by the student opposite. He is a hardworking, hard-working student. Although he has failed the judicial school entrance exam three times, he still persists in continuing to register for the exam again. But ever since he met Haruka, he had fallen in love with this beautiful woman. He always watched and knew all the secrets, the loneliness that Haruka was experiencing. One time he went to steal Haruka's underwear and saw Haruka masturbating. Unable to take his eyes off her beautiful body, he was discovered by her. He left it all behind, even if he went to prison or she wanted to kill him, he didn't care! He only wanted to have sex with her once, to be satisfied with her, to heal her broken heart. Growing more and more disappointed with her husband, Haruka also gradually accepted the student from the opposite house, continuing their clandestine relationship...