1girl, o, arms_behind_back, bikini, blue_bikini, blush, bow, brown_hair, flat_chest, groin, hadacra, hair_bow, half_updo, idolmaster, idolmaster_cinderella_girls, loli, long_hair, looking_at_viewer, navel, nose_blush, simple_background, solo, string_bikini, swimsuit, tachibana_arisu, thigh_gap, white_background