kawata hisashi, mizuki mana, white album, white album (series), frilled swimsuit, scan, 1girl, afloat, ass, bare shoulders, barefoot, black hair, blue eyes, blue hair, blush, bracelet, casual one-piece swimsuit, feet, female focus, flower, frills, from behind, hair flower, hair ornament, innertube, jewelry, light rays, long hair, looking back, matching hair/eyes, one-piece swimsuit, open mouth, soles, solo, sunbeam, sunlight, swim ring, swimming, swimsuit, twintails, water, wedgie, wet