Ookami wa Nemuranai

One-eyed Wolf Lecan is a skilled adventurer who has conquered many dungeons all over the world. He had been going solo for a long time, but in the last three years, he's had a partner. That partner jumps into the black hole together with Lecan, and both go their separate ways as they fall into another world. Dungeons and magical beasts also exist in that world. After learning the native language, Lecan goes on a journey. Meeting a good teacher, Lecan studies medicine making and magic under that teacher, and begins his dungeon explorations for real.

(Source: Sousetsuka)

Ookami wa Nemuranai began as a web novel on Shousetsuka ni Narou on November 1, 2017, and completed with 898 web chapters on September 8, 2021. A revised and illustrated version of the series has been published by Kadokawa since January 18, 2019.