Yasumura Shoichi

21-year-old university student living alone in Satsuki's apartment who admires her. After witnessing her affair he becomes her sex partner the next day, continues creampie sex and daily visits, then invites friends for a gangbang party.

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.

33yo black-company salaryman of about 10 years, body and mind exhausted, and a virgin. Dragged into neighbor Sora's drinking party with Rin and Natsuki, exposed as a virgin, stripped after breast exposure, receives fellatio and facial from Natsuki, has first intercourse with virgin Rin nearly creampieing before using a condom, then doggy-style sex with Sora, continuing overnight group sex with all three 20-year-olds and still having sex with them the next day while job-hunting.

24-year-old office worker with large breasts; Kazuya's elementary-school classmate who liked him since childhood; former tomboy who lacked confidence as a girl; virgin who invites Kazuya home, strips to lingerie, performs fellatio, has missionary and doggy vaginal sex, orgasms, and receives a creampie.

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.

38-year-old full-time housewife and aunt who continues sex with nephew Shoichi; on the chapter end page she begs for more penetration while having intercourse.