inato serere, gokou ruri, kousaka kirino, makishima saori, ore no imouto ga konna ni kawaii wake ga nai, revision, 3girls, :<, :3, :d, @ @, animal ears, bikini, black hair, blue eyes, blue hair, brown hair, cat ears, coke-bottle glasses, day, dutch angle, glasses, hands on own hips, innertube, long hair, looking back, mole, mole under eye, multiple girls, navel, one-piece swimsuit, open mouth, outdoors, red eyes, school swimsuit, skirt, smile, swim ring, swimsuit, twintails, wading, white one-piece swimsuit, white school swimsuit