in the case of a man's wife, shibayoko, on a swinging train. (reprinted special price version)

When she was a female college student, Yoko married Naoyuki, who had her help when she was in the school, and lived happily. However, one day Naoyuki realized that he was having an affair and recently consulted Misato, who can talk easily with his friends. Misato recommends that Atsuyoko have an affair, and invites stranger men and women to a gathering of 'adults' who share time only for sex. At first, the deceived Atsuyoko also participated in the party. However, once I thought of it, I was accompanied by the man I met there.