2girls, ass, black_hair, black_one-piece_swimsuit, blue_jacket, blush, breasts, brown_eyes, brown_hair, collarbone, competition_swimsuit, covered_navel, dark-skinned_female, dark_skin, grin, hair_tie, highleg, jacket, large_breasts, long_hair, lying, mizuhara_yuu, multiple_girls, on_back, on_side, one-piece_swimsuit, open_mouth, original, red_jacket, shiny_skin, sideboob, smile, swimsuit, thighs, twintails, whistle, white_one-piece_swimsuit, yellow_eyes