1boy, 1girl, blue archive, blush, bottomless, breasts, closed eyes, clothes lift, cowgirl position, gigantic breasts, girl on top, greyscale, gym uniform, hair over one eye, hasumi (blue archive), hasumi (gym uniform) (blue archive), hetero, kurowa, monochrome, motion lines, naked shirt, nipples, official alternate costume, open mouth, saliva, sex, shirt, shirt lift, solo focus, spread legs, straddling, sweat, trembling, vaginal