As the Demon King: I must protect the heroes
It is said that if the strongest demon king, the final boss of the game is defeated; the entire game world would immediately come to an end.
And if the hero dies, the world is predicted to reset to the hero's last checkpoint.
For players, achieving that ending would be a moment of triumph, the proud culmination of the original game’s "happy ending" script, since they’re playing as the main character. But for Satanos, things are different. He was once an ordinary man who suddenly reincarnated as the demon king.
One day, upon realizing the reality of his new role, Satanos began searching for any way possible to prevent the world from ending. And for personal reasons feeling unfit to be a ruler and simply wanting to live freely; he decides to fake his death in front of the hero.
As a result, he is now forced to protect the heroes from the shadows. Because in truth, the enemies of the heroes aren’t just demons, certain nobles and individuals are also plotting to kill them for their own selfish reasons.
Thus begins the free-spirited life of a former demon king, surrounded by ridiculous characters he meets in an adventurer city, characters who end up being recruited as his secret shadow heroes.