niban (puka 0507), shiun sumika, gakuen idolmaster, idolmaster, commentary request, highres, 1girl, ball, beachball, bikini, black bikini, blonde hair, blush, breasts, cleavage, collarbone, front-tie bikini top, front-tie top, green eyes, hair ornament, hairclip, hand on own chin, hand up, jacket, jacket partially removed, large breasts, long hair, long sleeves, looking at viewer, mole, mole under eye, multiple hairclips, official alternate costume, one eye closed, partially unzipped, simple background, single bare shoulder, smile, solo, sweatdrop, swimsuit, thigh gap, white background, white jacket