The World's most Overpowered Side-Character - Chapter 43: The Heart Oath

A small immortal clan, with the efforts of the ancestors of the past dynasties, slowly developed into an immortal clan. This is the history of the development and growth of a small family. During this period, there were ups and downs, and there were also struggles for power and profit.

- Description from novelbuddy

An ordinary student accidentally traveled into an other universe and became the king of a small kingdom. He had gotten a “Cheating Code” of life and was able to complete something extraordinary. This is the story about a king that was able to conquer continents and leave behind him an ultimate legend that will be recited between every generation to come.

—WSA 2025 ENTRY—The weakest loser they mocked for years wasn’t at all weak—he was a god in disguise, with the power to bring the world to its knees.“I want you to teach him humanity, so he who feels NOTHING but rage can at least learn morality”“And you trust a Demon to do that?”Seiya dreamed of becoming a hero, one of those legendary warriors everyone worships. But his Awakening failed, leaving him powerless and humiliated—a target for cruelty.Locked away and tormented by those he trusted, his suffering revealed the truth of his origin: he wasn’t just human.Unleashing powers that defy the laws of the world, such as his All-Seeing eyes—capable of negating time, absorbing skills used against him and granting him 360° vision.Seiya rises from the shadows, no longer a punching bag but a force that terrifies demons, monsters, and humans alike.Hero or villain? It doesn’t matter. He’s done obeying, done breaking for anyone.Now, they beg for mercy from the god they tried to crush. Seiya’s only question: should he grant it?Brace yourself for a journey of chaos, revenge, and the rise of an unstoppable power.Seiya doesn’t need your approval—he’s taking the world, one broken rule at a time.————————————————————Yes! He does turn to a cold villain and loses all emotion except rage but the process leading up to it might drag a little__stick around longer and you won’t regret it.Read the prologue next after this so you understand the world settings.

Xiao Ran transmigrated to a parallel world and obtained the “All-Round Olympic Star” System.

The first sport that he had activated was actually the e-sports League of Legends!

Fortunately, e-sports was now integrated into the Olympics.

Pentakill, Legendary, Torturing the Pros.

Xiao Ran is a jungler… What? Why is he playing mid-lane in this match??!!

Ban the jungler and mid-lane champions that Xiao Ran can use to carry… God damn it, why is he playing top now!!??

“Start the bets, start the bets. Let us guess what position is God Xiao going to play next!!!”

…

“Why!! Why is an e-sports professional player sprinting 100 meters in 9.8 seconds!?”

“What!! His swimming is actually faster than Phelps!!”

…

Xiao Ran. The man who possesses the “All-Round Olympic Star” System…

- Description from Novelupdates