os-tan
98-tan, 98se-tan
satou atsuki
2girls, all fours, arm support, black hair, black thighhighs, blouse, blue eyes, blue hair, bob cut, feet, hair bobbles, hair ornament, lying, miniskirt, multiple girls, no shoes, number hair ornament, panties, pantyshot, shirt, short twintails, sitting, skirt, socks, thighhighs, twintails, underwear, white panties