While his wife was away on a trip, Goro struggled with the unfamiliar housework. Then his wife's sister, Rie, came to help with the housework. Goro, who had trouble even cleaning, welcomed Rie in with pleasure, but something was a bit off. She got closer than necessary, and the feeling of her big breasts pressed against him made Goro lose his senses. He was overwhelmed by Rie's aggressiveness and ran into the bathroom, but he couldn't escape Rie's clutches.