1girl, armpits, ass, beach_umbrella, blonde_hair, blue_eyes, blue_one-piece_swimsuit, blue_sky, breasts, cloud, competition_school_swimsuit, dark-skinned_female, dark_skin, from_behind, fuu_(koneko_no_yomeiri), hair_tie, idolmaster, idolmaster_cinderella_girls, layla_(idolmaster), looking_back, mouth_hold, one-piece_swimsuit, petite, school_swimsuit, shade, sky, small_breasts, solo, swimsuit, tan, tying_hair, umbrella