With their third wedding anniversary fast approaching, Shinichi, a husband, was preparing a surprise. One day, his wife Nao is confronted by a man named Yoshino, who claims to be his fiancé. He relentlessly pursues her, and when she gets drunk at a drinking party, he drags her to a hotel by force... With his weakness exposed, Nao is asked to have sex with Yoshino almost every day, and she gradually begins to accept his beast-like sex. Then, on their wedding anniversary, Shinichi is hiding in the closet, waiting for his beloved wife, when someone appears in front of him...