I can return to the age of mysterious - Chapter 70 - 0 Northern Flow City_1

In a world where power is hidden behind corporate empires and ancient martial legacies, John Lopez lives a double life. Known publicly as a carefree young man, he secretly bears the terrifying title of the King of Horizon, a supreme martial expert feared across the continent.When his beloved sister Queenie becomes the target of a brutal smear campaign threatening to destroy her company and reputation, John is forced to confront the shadows lurking in the high towers of business and politics. As conspiracies deepen and enemies rise—ranging from corrupt business moguls to deadly assassins—John’s wrath becomes unstoppable. But danger isn't only around him—it strikes home when his eldest sister, Alice, falls victim to a rare and deadly poison. With time running out, John must defy the odds, wield ancient techniques, and unleash the full fury of Horizon’s might to protect his family.

In the vast Marvel universe, where superpower was still slowly growing in its infancy, several peerless superheroes tried to find their path in The Marvel Universe. A young adult named Ron from modern Earth unwittingly stumbles into such a world and begins his journey with an unknown power. This is a magnificent yet unknown true marvel world! This is the story of a normal young adult and his adventures!

- Description from Novelupdates

Surgeon Guan Ryo Is reborn in Naruto’s world! Enjoy his trip as he uses his knowledge of the story to find his path in this troubled world and eventually stand at the top of Konoha!