1girl, arm_support, bikini, blush, breasts, cleavage, feet_out_of_frame, grin, idolmaster, idolmaster_cinderella_girls, looking_at_viewer, medium_breasts, multicolored_bikini, multicolored_clothes, navel, orange_hair, pool, poolside, shirota_mizuki, short_hair, smile, soaking_feet, solo, swimsuit, yoshioka_saki