Momo and her husband are affectionate newlyweds. She attends a company drinking party but still has not returned late into the night. Since every employee at her workplace is a woman, her husband assumes nothing strange could happen and that the party simply ran long. Then he hears intensely erotic moans leaking from the room next door—and the voice sounds uncannily like Momo’s. They had promised to have sex when she came home, so he tries to wait, but the moaning becomes too much and he starts masturbating, unaware that his drunken wife has entered the neighbor’s filthy room by mistake and mistaken the middle-aged man inside for him.