98-tan, xp-tan, os-tan, white legwear, highres, 2girls, aqua skirt, between breasts, black hair, blue skirt, blush, breasts, brown hair, covered erect nipples, cowboy shot, hair ornament, hairpin, head between breasts, height difference, large breasts, looking down, machinery, multiple girls, panties, pink panties, pleated skirt, robot, simple background, skirt, standing, sweatdrop, thighhighs, underwear, zettai ryouiki