Eri and her husband lived happily together except that her husband was always busy with work. One day, Yuka invited her to attend a class reunion. Yuka shared that her husband was always busy with work and wanted Hamano to advise her. They organized a party for 3 people but Yuka had to go home first, leaving the man and woman alone in a room. Hamano had admired Eri since they were in school together but never had the chance. This was the best chance for him to prove his feelings. Due to the lack of sex, Eri gradually stopped refusing Hamano.