The Bad Guy Who Got the Brave System

A bad guy gets the Brave System, where will he go? Save the world? Destroy the world? How it is, we don't know! His identity is mysterious, no one knows his origins, and no one knows how strong he is. His coming brought endless changes. The whole world has become different. It also created the existence of two brave men! How should such an unreasonable plot proceed? Where should the resurrected Demon King go? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.