1girl arms_behind_back black_capelet black_hair black_neckwear black_skirt blush capelet closed_mouth collared_shirt commission date_a_live dress_shirt floating_hair hair_over_one_eye hair_ribbon highres long_hair looking_at_viewer low_twintails medium_skirt pink_ribbon red_eyes ribbon shirt signature simple_background skirt smile solo standing sumi_(oyasumie) tokisaki_kurumi twintails very_long_hair white_background white_shirt wing_collar