Suzu's Stepbrother

Long black hair, large breasts, wearing school uniform, frequently appears in sexual scenes

Long light/silver-blonde hair with clips, large breasts, golden pubic hair; fully nude during intense cowgirl sex with cousin Daiichi, then lace lingerie; sexually forward exchange student who demands creampie and asks if he loves her.

Male character with short black hair and school uniform who engages in sexual intercourse with Haruka

Shoulder-length light hair, large breasts, casual home clothes; sees Daiichi and Chloe together on the sofa and remarks they get along, then dryly comments on them in bed.

Male university night part-timer who argues with manager Kurokawa at the register about their hotel encounter while a customer waits.

Kind female convenience-store manager who tells a male university part-timer he can leave early and that she will handle the inventory.