agaa (masatu), kikuchi makoto, idolmaster, idolmaster (classic), highres, 00s, 1girl, animal ears, antenna hair, ass, beach, blush, brown eyes, brown hair, cat ears, cat girl, cat tail, competition swimsuit, day, elbow gloves, female focus, gloves, looking back, nature, ocean, one-piece swimsuit, one-piece thong, outdoors, panties, short hair, sky, solo, swimsuit, tail, thighhighs, thong, underwear, white thighhighs