orizen, arato nagi, imari youko, tanigawa ruri, ruri no houseki, 3girls, armpits, arms up, bikini, black-framed eyewear, black bikini, black hair, blonde hair, blue bikini, blush, bouncing breasts, breasts, brown hair, covered erect nipples, covered eyes, earrings, excited, from side, gem, glasses, gluteal fold, green eyes, hand on own hip, holding, holding gem, jewelry, large breasts, long hair, multiple girls, navel, open mouth, outdoors, plump, short hair, side-tie bikini bottom, small breasts, smile, standing, sweat, swimsuit, yellow bikini