1girl, bikini, breasts, brown_hair, cleavage, closed_mouth, collarbone, cowboy_shot, front-tie_bikini_top, front-tie_top, green_eyes, halterneck, hand_in_own_hair, idolmaster, idolmaster_cinderella_girls, leaning_forward, long_hair, looking_at_viewer, matsuyama_kumiko, medium_breasts, namidako, navel, purple_bikini, side-tie_bikini_bottom, simple_background, smile, solo, swimsuit, white_background