【Manga adaptation now available on "Manga UP!"! From Chapter 32, the story diverges from the manga version.】

Menas, the Demon Emperor — Emperor of the Noah Empire, commanding myriad monsters.

Feared throughout the world, he one day learns that he is 'the final boss of an RPG'.

Thinking he wouldn't come to a good end if things continued this way, Menas decides to abandon his role as the final boss.

During an event early in the game, he 'feigns' defeat at the hands of the protagonist, Alec, and secretly embarks on a journey.

However, a final boss who had been cooped up in his castle (the last dungeon) all this time naturally lacks common sense, and the outside world's 'level' turns out to be far lower than he expected――.

This is... the story of a 'feral' final boss who utterly demolishes the storyline while living a free and uninhibited life.

※Also posted on Kakuyomu.