Haruka is a beautiful married woman. Lately, her husband has been coming home late and not eating dinner at home, and they haven't been intimate for a long time. She becomes more certain when she smells a woman's perfume on her husband's clothes and hears a woman's voice calling wanting her to divorce him. She reassures herself that everything will be fine, and her husband will come back to their home. But she is really lonely, her long-suppressed sexual desire keeps accumulating, making her resort to masturbation to alleviate the emptiness in her heart. She doesn't know that every action and expression of hers is being observed by the college student living across the street. He is a diligent and hardworking student. Despite failing the law school entrance exam three times, he continues to persevere and register for the exam again. But since meeting Haruka, he has fallen in love with this beautiful woman. He constantly watches and knows all the secrets, the loneliness that Haruka is going through. Once, while sneaking in to steal Haruka's panties, he sees Haruka masturbating. Unable to take his eyes off her stunning body, he is caught by her. He disregards everything, even if he is sent to jail or she wants to kill him, he doesn't care! He just wants to be intimate with her once, to satisfy her, to mend her broken heart. Growing more disappointed in her husband, Haruka gradually accepts the college student across the street, continuing their clandestine relationship...