1girl absurdres black_pantyhose black_suit blue_archive echj formal from_behind halo hand_up highres jacket jacket_removed long_hair looking_at_viewer looking_back panties panties_under_pantyhose pantyhose pantyshot pleated_skirt red_eyes rio_(blue_archive) simple_background skirt standing suit sweater turtleneck turtleneck_sweater underwear upskirt