busan no hamaguchi, kinoshita hinata, idolmaster, idolmaster million live!, commentary request, highres, 1girl, ahoge, armpits, arms up, ball, beachball, bikini, blush, breasts, brown hair, collarbone, cropped legs, floral print, green bikini, green eyes, groin, halterneck, holding, holding ball, holding beachball, medium breasts, navel, ocean, print bikini, ribbon-trimmed bikini, ribbon trim, short hair, simple background, smile, solo, stomach, swimsuit, white background