MTL - I Have a Mansion in the Post-apocalyptic World - Chapter 1569 Reciprocity

A boy from 21st century Earth, met an accident and later was reborn in Naruto’s Ninja World.
He is born in Uchiha Family and becomes the useless brother of Itachi Uchiha and Sasuke Uchiha…. Let’s see how he changed the Naruto world.

- Description from Novelupdates

Skyscraper's rooftop.Fang Cheng is sweating heavily, relentlessly training.1000 airborne clapping push-ups.1000 two-finger push-ups.1000 one-arm pull-ups.1000 one-arm handstand push-ups.1000 single-leg squats.Plus, holding a dragon flag and a Baki plank for one hour.Looking in the mirror, Fang Cheng shows a satisfied expression.“All six skills are maxed out, I can finally synthesize the mythic talent, Asura's body.”Neon-lit chaotic dark city, countless crimson eyes lurking around.Conglomerates, serial killers, cultists, gene-modified beings, rebel groups…Fang Cheng, with his panel, intrudes into this seemingly ordinary mysterious world.Gaining experience and cultivating through push-ups.Fitness, boxing, sanda, parkour, meditation, breathing, qigong…Each seemingly ordinary skill achieves unimaginable heights.Pushing human limits ever higher, crushing every so-called “monster.”Until — becoming the god of the new world!

Frank, a mercenary known for his cold ruthlessness, decides it’s time to leave the bloody world of the underworld behind. But the underworld has no plans of letting him go. Relentless enemies from his violent past keep hunting him, and eventually, they succeed—Frank is killed.But fate has other plans. Instead of staying dead, he is mysteriously reincarnated into the body of a cop in a world filled with crime, corruption, and dark secrets. With the help of a strange, all-knowing system, Frank is given the chance to live again—this time, to prevent crime before it happens.

“He who bears the light of heaven and the rage of hell shall decide the fate of gods and beasts alike.”When the world shattered and stars fell from the heavens in blinding storms, a child was born—cursed with the power to either end the eternal war or bridge the gap between heaven and hell.Now, hunted by gods and worshiped by shadows, he must choose which side of his soul will burn brighter - light of heaven or fury of hell.