1girl, armpit_cutout, artist_name, ass_visible_through_thighs, atsuko_(blue_archive), black_background, black_leotard, blue_archive, braid, breasts, clothing_cutout, covered_collarbone, covered_navel, cowboy_shot, dated, groin, hair_ribbon, hands_on_own_stomach, head_out_of_frame, heavy_breathing, highleg, highleg_leotard, leotard, long_hair, long_sleeves, low_twin_braids, monochrome, parted_lips, ribbon, sidelocks, simple_background, small_breasts, solo, standing, twin_braids, y0ung