"The world where the hero is summon"

Being use only for one purpose, is kill the Demon king, without even a little support

Or even fund's, all the human is hostile to him after he killed the demon king, he been

Invited to the world conference, that will kill him he didn't appear, the cost is all of his skill, that he honed over a decade's, and he been treated

As a Rebel, he decided to become the next

Demon king, and conquer the world and kill all

The human beings, and to do that he

Need to plunder, the hostile monster

Or some that while get in his way, In the future and gain A comrades along the way.