Yuko lives with her husband's father at her parents-in-law's house, and one of the things that bothers her is her brother-in-law Keisuke, who comes over from time to time. She feels uncomfortable with his insensitive and rude personality. Then one day, all the relatives gather to celebrate her father-in-law's 70th birthday, and of course Keisuke is among them. At first, Yuko keeps her feelings to herself, but at the party, Keisuke gets drunk and approaches her rudely. Then, one night when everyone is drunk, Keisuke approaches Yuko with a flushed face...