I am really not a medical immortal. - Chapter 12 - : Kicking the Cleaver

Synopsis: Apocalypse King: The Return of LucianLucian died in the apocalypse—betrayed, powerless, and consumed by the undead. But fate gave him a second chance. Reborn one month before the end, he awakens with future knowledge, an overpowered system, and a ruthless new personality.This time, he will not be weak. This time, he will rule.With Infinite Storage, he stockpiles weapons, food, and everything necessary to survive the apocalypse. Winning the $3 billion lottery, he builds an impenetrable super shelter, reinforced with military technology, luxury, and high-tech defenses. Using his Beauty Evaluation System, he gathers only the most stunning women—90+ points or higher—into his harem, ensuring their unwavering loyalty.As zombies evolve, superpowers awaken, and the world crumbles into madness, Lucian will steal, conquer, and dominate.No gods. No heroes. Only the Apocalypse King.A brutal, R18+ tale of survival, power, and harem in a world where the strong take everything.

Failing at the ceremony, Ethan became a Broken Carrier, the worst and weakest of them all.In this world where abilities had to be created and found through the Patterns, Ethan had no choice but to risk everything to change his fate.“So this is my Construct?” Ethan gazed at the massive gears of his core, preparing to harness a new power.The weakest carriers could always become the strongest, all that was needed were methods, desperate and risky, just like the world itself.

In the morgue full of Uchiha corpses, he opened his eyes…

A mysterious voice rang in my ear…

He looked confused: “Saving the ninja world, what’s the matter with me, the remnants of Uchiha?”

- Description from novelbuddy

Protagonist travels between different anime worlds to right wrongs and uncover his reason for being along the way.