niban (puka 0507), ohtsuki yui, idolmaster, idolmaster cinderella girls, absurdres, highres, 1girl, black panties, blonde hair, blue eyes, blush, bow, bow panties, cameltoe, collarbone, from above, hexagon print, legs up, long hair, looking at viewer, lying, navel, no pants, on back, open clothes, open mouth, open shirt, panties, polka dot, polka dot shirt, shirt, short sleeves, smile, solo, spread legs, sweat, underwear, wavy hair, yellow shirt