The Kojima couple, celebrating their fifth year of marriage, were living an ordinary life. One day, Yuuka's brother-in-law, Tomoki, came to the Kojima house. As a weekly routine, the three of them would have dinner together. Although he put on a bothered face due to his brother's nagging, Tomoki actually had a certain "enjoyment." It was rummaging through Yuuka's used underwear in the washing machine and sniffing it relentlessly!
