urushihara satoshi, 3girls, 4boys, armpits, backpack, bag, bra, breasts, brown hair, clothed male nude female, exhibitionism, female pubic hair, glands of montgomery, glasses, groin, hip focus, holding, lingerie, looking at viewer, midriff, multiple boys, multiple girls, navel, nipples, nude, onlookers, outdoors, panties, pubic hair, public indecency, randoseru, school, smile, standing, uncensored, underwear, undressing