After ten years of marriage, the Kurodas have grown distant. To teach the husband some bedroom technique, eccentric relationship coach Junichiro Ishida proposes having sex with the wife right in front of him. Though embarrassed, the husband gradually rediscovers his affection as Ishida praises her. With dirty talk flying between the coach and the wife, the husband finally becomes too aroused to stay out and joins in—only for the shameless coach to steal the final creampie for himself.