Prologue: the birth of the Reaper

The man who transcend the limits of the human body, allowing him to become a being akin to a God. Six years ago, his name was feared throughout the underworld, making even the most feared villains to shudder before his name. Now, six years have passed ever since his fight against the number one villain and has retired ever since. That is until an old friend of his gave him an offer, an offer that resurrected a long dead dream of his. If he can't be a hero, then teaching the next generations of heroes will do.