1girl, bikini, black ribbon, blue sky, breasts, brown hair, closed mouth, cloud, day, flat chest, green eyes, hair ribbon, hiroki (yyqw7151), hisakawa nagi, idolmaster, idolmaster cinderella girls, long hair, looking at viewer, low twintails, navel, ribbon, side-tie bikini bottom, sky, solo, swimsuit, twintails, white bikini