Outpainting illustration, expand background. Do not change the characters' faces, bodies, or clothes. Keep the exact faces, glasses, and hair from the reference image completely identical. Seamlessly fill and extend all the empty white space on the left and at the bottom with the school corridor background. Cleanly continue the linework of the concrete floor tiles, windows, and wooden school lockers, extending them towards the far left edge. Keep the same perspective. Exact same manhwa webtoon style, crisp sharp lines, cel-shading, 16:9 aspect ratio.
