Douluo Dalu - Chapter 204 — Tang Sect’s Number Four, Thousand and One Nights

The one single goal in life of the Strongest Old Sage is to subjugate the Demon King. In an epic final battle, both of them met their mutual destruction at each other’s hands.

However, the Demon King was not completely destroyed!

In order to destroy the Demon King once and for all; post-death, the Old Sage trains in the World of Gods and reincarnates as the Apostle of the Gods, Will.

In the reincarnated future, the Old Sage had become a legend and his former disciples hold the supreme authority in the world. The disciples had created an organization to oppose the Demon King and an academy to nurture the new generation of Heroes.

Thus the Apostle of the Gods, Will (8 year old), enrols into that Academy of Heroes.

This is the story of a boy on a mission to save the world through epic battles while enjoying Academy life.

I exist in the darkness, disappear under the bright light, and will eventually devour the sun and turn into the shadow of all things… Known by people as the indescribable terror of darkness; the king of shadows; the dark day; the existence of the shadow of the world , is still just a somewhat special high school student, facing a weird death game…

- Description from novelbuddy

A person's perspective plays a vital role in developing one's personality. What happens when you realize the world you live in is the same as a Novel.

Zero Elea gets a Skill called Parallel Memory which allowed him to get the memory of his alternative self of a different universe.

He realizes that the world he lives in is similar to the novel he used to read in his alternative world. The world will face catastrophe in the future but there is no need to worry as there is a main character working hard to save the world.

And what about me? I am but a mob character.