2girls absurdres beach black_footwear black_legwear black_ribbon black_skirt brown_hair closed_eyes earrings from_behind hair_ribbon highres hisakawa_hayate hisakawa_nagi holding_hands idolmaster idolmaster_cinderella_girls jewelry long_hair moai_(more_e_4km) multiple_girls open_mouth outdoors over-kneehighs photo_background ribbon shirt shoes short_sleeves siblings sisters skirt smile socks thighhighs twins twintails water white_shirt