Overlord Manga is based on the light novel series. It is a manga adaptation written by Satoshi Ōshio, with art illustrated by Hugin Miyama. It began serialization in Kadokawa Shoten's manga magazine Comp Ace. As of now, eleven volumes have already been published in Japanese since November 26, 2014.
Currently, it is an ongoing manga that releases one chapter per month in Monthly Comp Ace. The manga is also licensed in North America by Yen Press. Eleven volumes have already been published in English since June 28, 2016.
The story begins with YGGDRASIL, a popular DMMO-RPG which is planned to quietly shut down on its last day. Our protagonist Momonga decides to stay until the last moment in his beloved game and wait for the forced logout. Unexpectedly, the server does not shut down and Momonga finds himself stuck in his skeleton body and ultimately transferred to an unknown world. "The powerful Overlord" needs to discover what lies in wait in the new world and face the continuous challenges. Having no parents, friends, or a place in society, this ordinary man strives to take over the New World.
The term "Episode" is actually used to describe the main chapters of the manga while "Chapter" is used to differentiate the intermissions from the main stories. The Special remains as it is.
Each manga tankoubon is packed with extra information in the form of intermissions with each focusing on one particular subject that is otherwise not easily obtained for those who do not read the Light Novels though the amount of information isn't as detailed.
Chapter 6's title is actually "Healing Portion" in the tankoubon, a grammatical mistake.