Kaineko no Ubaikata

One day, Chida, who has a part-time job for building cleaning, gets caught up in the play of a bad-looking gay couple. However, the sex is so comfortable that one of the couple, Saijo, can not be forgotten. At that time, Sakiko, who should have been a boyfriend of Saito, "Let's enjoy more?" And he is invited to 3P play…