Hikaru, the wife he loves, returns to college to earn a qualification. Her sociable nature already makes her husband uneasy, and a photo from a seminar party shows her having fun with a handsome younger man. He convinces himself she would never want such a sleazy flirt, but she starts coming home later and replying less often. He refuses to believe anyone would touch a married woman, even as the truth becomes obvious: instead of attending lectures, she spends her days fucking the younger scumbag, returning home night after night after he has defiled and creampied her repeatedly.