matsuryuu, original, 1girl, bare shoulders, barefoot, black hair, blush, breasts, brown eyes, collarbone, competition swimsuit, covered navel, feet out of frame, female focus, groin, highleg, highleg one-piece swimsuit, leg lift, long hair, looking at viewer, lying, medium breasts, on back, on floor, one-piece swimsuit, parted lips, ponytail, smile, solo, spread legs, swimsuit, toes, towel, very long hair