Modify the first reference image. Keep the exact full-body posture, muscular arms, black t-shirt, and solid green background from the first reference image. Replace only the head and neck. Seamlessly blend the exact head, hair, eyes, nose, jawline, and profile from the second reference image onto the body. Do not add any new sweat, blood, or extra details. Maintain the clean 2D manhwa webtoon line art and flat coloring.
