The Marriage of an Esteemed Supreme Healer, a Noble Ruler - Chapter 2578 - Side Story 82: Weak

The end of the world is coming, the world has undergone great changes, and everything has changed. Plants, animals, and even insects, as long as there are living things, have mutated.
Become more powerful, and even evolved supernatural abilities, such as chickens and ducks that can fly to the sky, such as cats and dogs that can breathe fire.
But only humans, without any obvious changes, seem to have fallen from the top of the food chain to the bottom of the food chain overnight.
Any creature that can open its mouth to eat can treat humans as food.
But fortunately, this world has not completely killed humans. Gradually, humans discovered that they had the ability to cultivate compatibility with other creatures.
As long as it has a high degree of compatibility with some powerful mutant creatures, it can be used for its own use to achieve the purpose of protecting itself.
Fang He is a person who is very compatible with mutant animals, but it is also because of his ability that he has changed from the strongest to the stupidest.
Fang He, who was reborn, said, “Hmph, this time…”

- Description from novelbuddy

(Naruto + Single Heroine Tsunade + Romance + Action)A failed author transmigrates into the Naruto world, becoming the younger brother of Konoha’s White Fang, Sakumo Hatake, and the uncle of Kakashi. He gains a cheat ability—enhanced cellular activity.Coincidentally, just before the Second Shinobi War, he participates in a Jonin meeting where he supports Tsunade's proposal ahead of Dan Kato, marking his first encounter with her.From then on, he launches an intense pursuit, winning her heart during the war.Tsunade: “Kawakaze, why do I keep losing to you?”Kawakaze Hatake: “Because I’d like to live a few more years...”Kakashi: “My uncle is amazing, I’m his biggest fan!”Kawakaze Hatake: “Keep it low-key, keep it low-key.”

Large-breasted, horny alien Empresses rule the galaxy. Julian doesn’t mind.He’ll go through every last one of them, fucking, conquering, if that’s what it takes to burn it all down.The Imperium of Archos invaded his planet.They razed it to ash.They killed the only girl he ever loved and then......left him to die.But then he found the Exion System, an ancient alien device built to make conquerors, not heroes.It bonded to his body and made him:THE GALACTIC KNIGHT.He’s not here to play hero. He’s here to burn the Imperium down.[Apocalypse System Activated]Host recognized: Galactic Knight.Command Authority: Unlocked.[Initiating Galactic Path.]Julian rises.He becomes a planetary governor.Then a warlord.But he’s not stopping there.He commands mech armies, crushes resistance, and spreads his reach across galaxies.Alien warlords, monolithic ugly monsters and cosmic gods will stand in his way, but they won’t stop him, he'll tear them to pieces!Planets of rivals will fall. Empresses will moan.And somewhere at the end of this blood-soaked path, the monsters who ruined his life will scream louder than anyone.They wanted war.He’ll give them hell.And he’ll make sure they watch him become the apocalypse they awakened.[CAUTION!][STRONG SEXUAL CONTENT.][BRUTAL, INTENSE AND BLOODY BATTLES]

Read at least six chapters, then prepare to crave the rest.The main character will show up in Chapter Five, though I don't recommend skipping the first four chapters.-----The world was celebrating. The Demon King was dead, along with his Darkness Generals.Humans led the other races to war for subjugation. They killed all, and none were spared. However, thousands of years before this happened, a piece of history was altered by time itself. In fact, the Demon King didn't have four generals but only one, which he sealed and sent into eternal slumber. Just as he started to close his eyes, the chains locked away for eternity shattered into pieces.