Maruta W and Maruta H, a Japanese couple, decide to spice up their marriage by exploring cuckolding fantasies. They visit a porn cinema, where Maruta W watches her husband's reaction to an NTR film. As the film progresses, Maruta W's voice grows huskier, her words more provocative. She encourages her husband to imagine himself in the cuckold's role, her breath hitching as she pictures another man taking her place. The cinema's dim lighting hides nothing from Maruta H's eager eyes, and soon, they're both eager to act out their newfound fantasies.