1girl, d, bikini, blue_choker, blush, breasts, brown_eyes, brown_hair, choker, collarbone, hair_between_eyes, hands_up, idolmaster, idolmaster_cinderella_girls, koga_koharu, looking_at_viewer, navel, simple_background, small_breasts, smile, solo, swimsuit, upper_body, white_background, white_bikini, wrist_cuffs, yuku_(kiollion)