ryouka (suzuya), nakatsugawa ui, hoshizora e kakaru hashi, absurdres, highres, 10s, 1girl, air bubble, ass, barefoot, bikini, blush, bracelet, brown hair, bubble, caustics, feet, female focus, fish, freediving, green eyes, hair ornament, hair ribbon, hairclip, hairpin, heart, heart hair ornament, jewelry, kneepits, long hair, looking at viewer, open mouth, outdoors, ribbon, soles, solo, swimming, swimsuit, underwater, unmoving pattern, white bikini