jinrou e no tensei maou no fukukan
人狼への転生、魔王の副官 (Jinrou e no Tensei, Maou no Fukukan, lit. Reincarnation into a Werewolf, the Demon Lord's Adjutant)
A Japanese light novel series written by Hyougetsu and illustrated by Nishieda.
It was initially posted on Shousetsuka ni Narou in 2015 and has been published by Earth Star Novel in the same year.
A comic series by Terada Isaza started in 2016.