Anime First impression: Lord of Mysteries
In a parallel world, in a city similar to Victorian London, our protagonist is transmigrated into Klein Moretti, an occult investigator.
After stumbling around, Klein joins a special agency that solves crimes involving "beyonders", people with artificially gained supernatural powers.
He takes a mystical potion that grants him a clarivoyance that sometimes acts on its own.
If you like Gothic Horror, this anime's for you.