yuzuki kei, hatsune miku, vocaloid, 1girl, ahoge, aqua eyes, aqua hair, ball, bare shoulders, barefoot, beachball, blanket, feet, female focus, food, grass, hand fan, headphones, hose, legs, long hair, lying, mouth hold, on back, one-piece swimsuit, outdoors, paper fan, popsicle, rubber duck, school swimsuit, soles, solo, spread legs, swimsuit, toes, twintails, uchiwa, very long hair, wading pool, water, wet