MTL - Demon Slayer: The Beginning of the Game Opens the Way of Reward for Diligence - Chapter 31

Time had run out. Azrael hadn't been chosen by the system, leaving him Forsaken with no hope for a prosperous life.But he wasn’t going to let it end like this. Even if it meant trading his life for a single chance, he would take it. It was either a life of greatness, one where he would reach the very top… or a short one, dying here, unmourned and forgotten by a cursed world that never cared he existed.“An early end in pursuit of greatness sounds better than a slightly longer one filled with stagnation and regret.”In the end, all the things he had done hadn’t been for naught. The sacrifices up until now had been worth it.[Inborn Trait activated][System devoured][Inborn Trait is fusing with the system][Devouring System has been granted]To his surprise, however, his system proved to be far more extraordinary than the others, granting him a unique path that only he could follow.With that realization, one thing became certain: no matter what monster or human stood in his way, he would reach the very top of the hierarchy, regardless of the cost.

A tree of 10,000 flowers, the world is the door.
The spells change a lot, but the hearts of the people are unchanged.

- Description from Uukanshu translation

only led to his death.But fate had other plans.Reincarnated as the son of the strongest being in existence, the Demon King. One might expect him to resist, to rebel against the Demon King and kill him once and for all.But why bother?Being the good guy led to nothing but betrayal and death. This time, he'll live for himself. Women, pleasure, power—he will claim it all, as any true demon would.

I intervene in all events of the game. And take it away.