1girl arms_up ball beachball bikini black_hair blush bracelet breasts brown_eyes eyepatch fang from_behind hair_between_eyes hayasaka_mirei heart heibonkaeru highres holding holding_ball horns idolmaster idolmaster_cinderella_girls jewelry open_mouth pink_bikini pink_horns short_hair side-tie_bikini_bottom small_breasts solo spiked_bracelet spikes swimsuit