1girl, o, ass, black_hair, blue_one-piece_swimsuit, blush, collarbone, feet_out_of_frame, flat_chest, hair_ornament, hairclip, hat, holding, holding_clothes, holding_hat, idolmaster, idolmaster_cinderella_girls, kickboard, looking_at_viewer, looking_to_the_side, maremay0513, one-piece_swimsuit, outdoors, pool, poolside, sasaki_chie, school_swimsuit, short_hair, signature, solo, swim_cap, swimsuit, unworn_hat, unworn_headwear, water_drop, wet, wet_hair