I'm sorry, but the book of the adventure became the Demon King. (Volume 1-13 is the latest issue)

Publisher: Nippon Bungeisha
Author: Kakeru
Size: 128mm x 182mm
Number of books: 13
Language: Japanese
Category: Shonen manga, manga
The latest release date: 2023-11-29

Synopsis:
Vermort XIII, a new king of Makai, who was given everything, is hoping to get everything with his own power. He invaded the human world with only his own sword and beautiful maid Sarah.
How the fate of mankind and how!?
Hit maker Kakeru, first comic original draft !! Invincible tag with supernova / Saito Umichi !!
Unprecedented dark fantasy, dignified opening !!