1girl, ahoge, armpit_crease, bikini, black_bikini, breasts, green_eyes, holding, holding_hair, idolmaster, idolmaster_cinderella_girls, light_brown_hair, medium_breasts, mouth_hold, profile, rubber_band, sato_shin, sideboob, simple_background, solo, sweatdrop, swimsuit, syamo_piyo, tying_hair, upper_body