Naruto: The Life Changer - Chapter 4 -: Iruka?

I, the mighty Telepath Starlord, got banished into the mortal world. The days in the mortal world are much better than those in heaven! Everything is here — money, authority and most importantly stunning beauties! I am from a rich family. Yes, I am indeed wealthy now. The kind of wealth where you would not want to displease me. Domineering CEOs, military big shots, business geniuses, you name it — I know them all! I know everything you are thinking about. You can’t defeat me anyway, how are you going to go against me? A century in the mortal world is only equivalent to a hundred days in heaven.
As an urban banished immortal, I will enjoy the heck out of my time in the human world and a huge commotion would arise in heaven!

- Description from Novelupdates

Damian, a Centurion of the Punishment Unit of the Baroque Kingdom. “Damn it.” Just once. If I were given just one more chance… ‘I would have truly conquered the battlefield with these guys.’ At the age of 30, he closed his eyes on a nameless battlefield. But when he opened them, he found himself back 17 years in the past. And this time, he had a perfectly functioning mana core that could wield magic. ‘This time.’ I will rise higher than anyone else. I won’t be swept away by the turbulent times. ‘I will conquer.’ Damian, who has returned to the past, wields his spear toward the world.

[This is your typical story where there is a System of unknown origin given to mankind, and the existence of Towers, Dungeons, and Constellations, the known or unknown ‘Gods and Demons’ of humanity’s collection of myths.]

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— Ding!

[Astronomical Event!]

An event called 'Emergence of Races' struck the human world where the planet Earth was stretched out like dough causing it to become seven times its original diameter.

Various Towers and Dungeons sprouted out of nowhere that caused an earthquake that broke the seismic scale.

Billions of humans died in the process that crumbled human society in an instant.

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And just like that, Russell Moon reincarnated in the world of his-considered-failure unpublished novel [The Forgotten Swordsman of Ruined Star], sixteen (16) years before the beginning of the ‘Main Story’ which was set forty (40) years after the Emergence of Races.

And due to that very reason, the existence of 'Untouched and Unknown elements' came back to bite him!

'Why did I write that way?'

Russell Moon lamented.

As a child with an unattainable dream, I yearned to become a Hero, but I veered off the right path. Looking back, my aspiration to save others was nothing more than a foolish dream. I now realize the magnitude of my sins and the impossibility of atoning for them.