Haruka is a beautiful married woman. Recently, her husband has been coming home late and not eating dinner at home. It has been a long time since they were intimate. She becomes more certain when she smells a woman's perfume on his shirt and hears a woman's voice on the phone asking her to divorce him. She reassures herself that everything will be okay, and her husband will come back to their home. But she feels very lonely, her long-unfulfilled sexual desire keeps accumulating, and she ends up masturbating to alleviate the emptiness in her heart. She is unaware that her actions and expressions are observed by the diligent student living across the street. Despite failing the law school entrance exam three times, he remains determined to try again. However, since meeting Haruka, he has fallen in love with her. He follows her and knows all the secrets and loneliness she is going through. One day, while stealing Haruka's underwear, he catches her masturbating. Unable to take his eyes off her beautiful body, he is discovered by her. He disregards everything, willing to face imprisonment or even death if she desires, as he only wants to be intimate with her once, to satisfy her, and to mend her broken heart. Growing increasingly disappointed with her husband, Haruka slowly accepts the student living across the street, continuing their clandestine relationship...