Usui Sachi

Short messy black hair, glasses; school/casual clothes then partially clothed under Chloe during penetrative sex; shy, aroused, climaxes inside her and answers yes when she asks if he loves her.

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.

Senior with short light hair and school uniform who greets Haruka in the final pages

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

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

Short-black-haired stepbrother with glasses. Has intense sex with Suzu, creampies her, then leaves for school in uniform the next morning.