Bilibili-sapphirefoxx

Finally, the sapphire glow reached his hair. The short, brown strands lengthened rapidly, cascading over his—her—shoulders in rich, dark waves. Mark, now standing as a completely different person, stared into the mirror. The man from moments ago was gone. In his place stood a woman who looked as though she had stepped out of a high-end fashion magazine, her expression one of utter shock.

SapphireFoxx specializes in "Gender Transformation" (TG) and "Body Swap" narratives. Because this content is often behind a subscription paywall on the official site, clips or fan-made montages frequently appear on Bilibili. bilibili-sapphirefoxx

Often involves a magical artifact (rings, mirrors, potions) or high-tech inventions. Finally, the sapphire glow reached his hair

He tried to pull away, but his hand felt heavy, almost liquid. He watched in a mix of terror and fascination as his fingers tapered, his knuckles smoothing out into delicate, pale points. The transformation climbed his arm like a slow-moving tide. His flannel sleeve suddenly felt cavernous, the heavy wool becoming a burden as his shoulders narrowed and sloped. The man from moments ago was gone

The sensation wasn't painful; it was a strange, tingly warmth, like a limb waking up after falling asleep. He gasped, but the sound that left his throat was an octave higher than it had been seconds ago. He clutched his neck, feeling the Adam’s apple vanish into a smooth, elegant line.