1girl, arms_behind_back, bikini, black_bikini, blonde_hair, breasts, choker, ear_ornament, fang, fang_out, hair_over_one_eye, halulu, idolmaster, idolmaster_cinderella_girls, looking_at_viewer, navel, red_eyes, shirasaka_koume, simple_background, small_breasts, solo, swimsuit, white_background