sakaki imasato, koshimizu sachiko, idolmaster, idolmaster cinderella girls, commentary, highres, 1girl, :3, armpit crease, bare arms, black bra, blush, bra, breasts, brown eyes, collarbone, denim, dot nose, from below, hand on own hip, jeans, light smile, looking at viewer, medium breasts, navel, no shirt, pants, purple hair, short hair, sidelocks, simple background, solo, underwear, white background