Querthe is an older fetish writer, who sadly disappeared from the internet a few years ago. They were active when sticky-site.com was still around and had many works posted on there. By now basically much of their work isn’t available any more, which is a real shame, as they have written some absolutely spectacular stories.
Luckily, I managed to find a few of their works in some archives, or they were reposted by other people on DeviantArt or Pixiv.