tamaru makoto, kotohara hotaru, yuuwaku, game cg, third-party source, variant set, 1990s (style), 1girl, blurry, blurry background, blush, bra, breasts, brown jacket, brown serafuku, brown skirt, brown socks, feet out of frame, female masturbation, grabbing own breast, green eyes, green hair, hair between eyes, indoors, jacket, long sleeves, looking at viewer, masturbation, medium breasts, miniskirt, nipples, open clothes, open jacket, open mouth, pleated skirt, raised inner eyebrows, retro artstyle, sailor collar, school uniform, serafuku, short hair, sitting, skirt, smile, socks, solo, sweat, underwear, white bra, yellow sailor collar