umekichi, hiiragi tsukasa, lucky star, bad id, bad pixiv id, translation request, 00s, 1girl, ass, back, blue eyes, blush, cloud, competition swimsuit, female focus, flat chest, floating, hair ornament, hair ribbon, happy, heart, in water, innertube, japanese text, looking at viewer, looking back, one-piece swimsuit, open mouth, outdoors, purple hair, ribbon, school swimsuit, shiny clothes, shiny skin, sky, smile, solo, swim ring, swimsuit, tongue, water