3girls, bikini, braid, breasts, bubble, closed_eyes, ensemble_girls!, green_eyes, iwato_san, long_hair, looking_at_another, mizushima_ushio, multiple_girls, pink_hair, pool, purple_eyes, red_hair, sakaki_mutsumi, sarasa_(kanbi), short_hair, smile, stretching, swimsuit, twintails, white_hair