Kenji and his wife Yuri begin married life in a cramped apartment, frequently visited by Kenji’s father Toru. He appears to be a caring father-in-law, but secretly harbors vile desires for his beautiful daughter-in-law. Once he can no longer restrain himself, he waits outside Yuri’s workplace, invents an excuse to take her home, and assaults her without mercy. After that, he starts arriving almost every day just as her shift ends, always intent on using her again.