Yota

38yo convenience-store manager and Suzu's husband. Sleeps snoring face-down at the table and remains asleep through his wife's affair and daytime seduction of Yamada.

20yo university student with short hair, large breasts and ass. Has a boyfriend but cannot resist Bunzo's large penis, strips for first sex, rides cowgirl feeling uterine pressure, has a condom put on just before ejaculation, and joins group and next-day all-night sex.

Taeko's son with glasses. Sleeps while Yota stays over at the house.

20yo clothing-store worker, blonde with large breasts. Newly moved next door, throws loud drinking parties, wakes Bunzo, apologizes and drags him to the party. Calls herself the lewdest of the three, spreads her vagina waiting for his penis, takes doggy-style penetration, climaxes forgetting work and seniors, and joins overnight group sex.

20yo convenience-store part-timer. After sex with Suzu he checks outside that her husband is asleep, and narration states Suzu's heart has fully become his.

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.