Mochimaru Sakaki

A final boss of an RPG game becomes even more unstoppable in this Isekai fantasy manga!The strongest final boss in RPG history knows exactly how to take over his world. Demon Lord Menas, ruler of the Noa Empire, finds the Resistance's forces on his doorstep. While Alex, a determined, beautiful, blonde young lady stands before him, he gets this weird feeling of deja vu... Isn't this just like the prologue of 'ResNoa', the video game he plays in his dreams?! Menas realizes that he was the final boss of his own world all along! He fakes his death at the hands of Alex and seizes his chance at a brand-new life with both hands.
Our dark hero takes his world by storm, using whatever cheat codes he has to protect his newfound freedom!