Keep everything exactly as it is — same Frieren character, same flowers, same banner and text, same bold line art style. Change only the empty window in the middle: make it a wide horizontal rectangle with a clean border, and position it exactly in the center of the frame, equal margins on the left and right. Keep the inside of the rectangle completely empty and pure white. Reflow the surrounding decoration slightly if needed so nothing overlaps the rectangle. Pure white background, no shading, no gradients, no gray tones.
