1girl, o, arms_behind_back, bikini, blush, breasts, brown_hair, collarbone, double_bun, green_bikini, hair_bun, hair_ornament, hair_scrunchie, idolmaster, idolmaster_cinderella_girls, looking_at_viewer, munakata_atsumi, naharyou, navel, purple_eyes, scrunchie, small_breasts, solo, swimsuit