Yasumura Shoichi

20-year-old factory junior worker with no girlfriend; is offered senior Gaku's wife Fumina, has oral and vaginal sex with creampie, then a threesome until midnight and is invited back for partner swapping.

48-year-old married housewife. Continues intense sex with Norio including anal penetration, creampies, and oral; climaxes with squirting and demands more semen and repeated sex.

College student and Kenichi's friend. Has first vaginal penetration, breast play and creampie with Taeko, then is held back when he tries to leave.

Kenichi's married mother. Continues vaginal sex, breast play and creampie with Yota, tries to make him her exclusive sex partner, and keeps having sex while her son sleeps.

Office worker living next door to Kaede. After embarrassing himself in front of her he drinks alone at night, then receives her visit and has kissing, fellatio, vaginal sex and creampie with her. Their affair continues afterward.

25-year-old wife of Hirata Gaku; large breasts and huge buttocks; appears demure but is a nymphomaniac who performs fellatio, vaginal sex, creampie and double penetration with junior Namino and her husband, then invites Namino back for partner exchange.