10_04ten 1girl absurdres bare_legs barefoot black_serafuku black_shirt black_skirt blue_archive blue_eyes blue_nails blush breasts cleavage closed_mouth collarbone demon_horns demon_tail erika_(blue_archive) full_body grey_hair halo hand_up highres horns index_finger_raised nail_polish necktie red_necktie school_uniform serafuku shirt short_hair sitting skirt smile solo tail