1girl, ball, beach, beachball, blonde_hair, blue_one-piece_swimsuit, blush, bow, cloud, competition_school_swimsuit, green_eyes, hair_bow, idolmaster, idolmaster_cinderella_girls, looking_at_viewer, maremay0513, one-piece_swimsuit, outdoors, ribbon, sakurai_momoka, school_swimsuit, short_hair, sitting, sky, smile, solo, spread_legs, swimsuit, thighs