Overlord is a dark fantasy light novel series written by Kugane Maruyama and illustrated by so-bin. It focuses on a man who was transported into a DMMORPG (Dive Massively Multiplayer Online Role-Playing Game) called Yggdrasil after its servers were shut down.
Source：https://www.cbr.com/anime-overlord-watch-one-punch-man-sword-art-online-log-horizon/
