koutaro, third-party source, 2girls, ass, black socks, blue hair, blush, buruma, buruma pull, changing, clothes pull, dressing, gym uniform, lace, lace-trimmed panties, lace trim, leaning forward, locker, locker room, looking back, multiple girls, panties, pantyshot, pink hair, pleated skirt, school uniform, serafuku, shoes, skirt, skirt pull, socks, surprised, sweat, sweatdrop, underwear, undressing, white panties