karaki chihiro, shikotama slave, game cg, 1boy, 1girl, arm support, black pants, black socks, blue eyes, blush, bouncing, bouncing breasts, breasts, breasts out, censored, clenched teeth, clothed sex, collarbone, female focus, girl on top, gym storeroom, head out of frame, knees, large breasts, m legs, miniskirt, mosaic censoring, no bra, no panties, nose blush, open clothes, open shirt, pants, penis, pink hair, pussy, school uniform, sex, shirt, shoes, short hair, skirt, sleeves rolled up, socks, spread legs, squatting, squatting cowgirl position, straddling, sweat, teeth, uwabaki, vaulting horse, white shirt, wooden floor