A woman transmigrates into the world of Gintama as Kamui's twin sister, with a golden finger, and then transmigrates into the world of Hunter x Hunter as well. P.S. One of her golden fingers comes from A Certain Scientific Railgun.
P.P.S. This is the re-release of Transmigrating Through Gintama and Hunter x Hunter: I'm Kamui's Sister, an authorized work originally written by the author. It was first published on April 25, 2020, but the entire book has been blocked, so the author had no choice but to repost it. Since someone else has also plagiarized it on another site, a new listing has been created.