hisayuki hirokazu, arika yumemiya, erstin ho, mashiro blan de windbloom, nina wang, my-otome, hand on shoulder, lowres, 00s, 4girls, :d, ahoge, bikini, blonde hair, braid, cat, caustics, goggles, goggles on head, green one-piece swimsuit, inflatable toy, inflatable whale, innertube, multiple girls, octopus, one-piece swimsuit, open mouth, pink bikini, pool, pool ladder, poolside, poster (medium), red bikini, smile, soaking feet, swim ring, swimsuit, twin braids, white one-piece swimsuit