Haruki

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

Male PE teacher who checks on Asahina, is pulled into kissing and explicit sex with her in the student council room despite protests, then collapses exhausted after creampie.

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

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

Long light-haired married woman who aggressively rides Atsuki bareback, allows creampie, then leaves before morning and chats online as siwori.

Short light-haired senior who helps Haruka after her fall, is called a gorilla by her, repeatedly turns her down, then stops her corridor seduction and eventually kisses her.