The Retired Hero is an Extra - Chapter 90 - : Twilight of Deception

The celestial celestial beings who lived for more than 100,000 years were born and reborn in a small monk in a human world.
His motto: “It’s not as good as a medicinal medicine for ten years of hard work.” “Even if you practice a copper-iron bone, it’s not enough for my soldier’s attack.”

- Description from Novelupdates

Living a perfect life helping others and without committing any wrongdoing, Noah meets his untimely end saving a girl from being hit by an incoming truck.While he accepts his end, he finds himself not in whatever afterlife awaits, but an enigmatic place only known as “The Cycle.”Due to his “Perfect” karma of one million, he is transported to a fantastical world of magic, though he chooses a simple, quiet life along a lake. However, when being sent to this second chance at life, one gift is bestowed upon him:[...Integrating System…][Jack-of-All-Trades System Activated.]From doing push-ups, chopping trees, and even cutting vegetables, every action is its own unique skill, able to be ascended from a meager level of zero all the way to greatness!

The course of commitments never did run smooth.

After dying on Earth, the King of Mercenaries is reborn as Su Mo in the Firmament and Continent. In this brand-new world, Martial Art is the way of life, and the strong set the rules.

Having awakened a Martial Soul of the lowest rank, possibly meaning he will never go far as a Martial Artist, Su Mo is determined to rise to the top again nonetheless.

However, misfortunes never come singly. The love of his life is soon taken by one of the most powerful forces in the world. With no time to spare, watch as Su Mo overcomes all odds and struggle on the verge of death countless times, in order to meet his love again.

As the protagonist reaches the top in that world, he has to take on more responsibilities and face new challenges.

Follow Su Mo on his relentless journey to become stronger for the sake of those important to him, and uncover the deep, dark secrets and plots in the vast universe.

- Description from Novelupdates

The middle boss of the AAA-class game produced by the company. The villain who dies 999 times out of 1,000 times. Deculein.That person, was me now.“You’re going to die on almost every route.”Deculein, like all villains, inevitably dies.[First and foremost survival goal: Be what the game requires you to be]I’ll have to survive even if it means twisting my fate if I am destined to die.