Konoha's Medical Ninja: One Punch to beat up Madara - Chapter 416: Devastated

He rose from abjection and achieved eternity in glory.
He embraced the prettiest beauties and killed the strongest opponents.
He was able to shift the clouds into rain and cover the sky with one hand.
He could overrun the entire world and go anywhere as he pleased.
He pacified wars and held the world in awe.
He was matchless in the world.
However, his hair turned white overnight for his beloved woman and he was on the verge of death.
He was surrounded by enemies who were trying to take his life.
He struggled his way to become mighty and fought for everything he cherished.
For this age, he was the only king of the Dark World.
His name was a byword for might.
As a man living in the world, his only ideal was to pursue brilliance.

- Description from Novelupdates

Ethan was just an ordinary guy until he woke up in the world of his favorite novel, Gods’ Final Requiem.But this isn’t a story where the hero wins. It’s a tragedy where the protagonist falls, the world crumbles, and the Demi-Gods and Outer Gods consume everything.And now, Ethan is here weak, talentless, and completely insignificant. A nobody in a doomed world.Yet, when an Empire Academy Admission Letter lands in his hands bearing his name he realizes something is wrong.More than that, his status window hides two sealed abilities, something that never existed in the original story.This wasn’t supposed to happen.If the world is truly destined to fall… then maybe, just maybe, he can change it.But first, he has to survive

He possessed the Xuan Gate Medical Arts and had fortuitously obtained a heaven-defying Spiritual Treasure!

Roan, ran away 20 years ago from his rural village in the aim of becoming a Great General. However, all he got 20 years later was just a handful of money and the lowly position of squad commander of the First Legion’s.