(masterpiece, high quality, ultra-detailed) A feminine artist's signature in elegant and delicate handwriting, gracefully writing the name "Yua Tsumugi" on a pristine white background. The signature is stylized with artistic flair, featuring gentle curves and smooth lines that convey beauty and sophistication. The writing is soft yet pronounced, emphasizing the elegance of each letter, with a refined and artistic touch that captures the essence of delicate craftsmanship.