Dating the Strongest Boss - Chapter 53 - Devil Exchange

In the year 2050, a colossal spaceship suddenly appeared above Earth.

Governments worldwide panicked as they saw the vast spaceship that had just teleported near Earth. Before they could even understand the situation, one humanoid alien emerged.

“Humans, I am your ancestor.”

“We distributed our life code with an atmosphere-changing module device to many universes and galaxies, hoping to recover our numbers after the war.”

“I will now awaken the earth's mana core and install a dimensional dungeon system, which will open many dungeons around the earth.”

“I'm also connecting Earth with a System.”

“This will help you awaken faster and get strong enough to survive in our universe. Gaia(system) will explain to you other important things,” He finished and then disappeared with the spaceship as he was never present there.

[Hello Humans, I am Gaia I will help you all to awaken and become strong]

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After 300 years, Earth is full of mana and many powerful beasts that roam all around the world.

All people awaken their “Book of Contracts” when they are 10 years old by clearing the beginner's trial, but Rishi failed twice to clear his trial and only has one chance left.

Which he has not used due to his fear of failing.

Follow Rishi on his quest to overcome his fears and become “The Greatest Beast Tamer of Earth.”

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Juvenile Luo Yang, because of the body being blocked by evil dragons, and with the blood of God, has embarked on a road to heaven! Rise from the humble, turn the mountains and seas, step into the world, and press the heavens!

- Description from 69shu translation

After causing a tech disaster in the real world, genius shut-in Rin Katsuro is sentenced by the gods and banished to Ereborn—a realm ruled by chaos, where ancient scripts control magic and dungeons feed on trauma.He wakes up in the body of a legendary war criminal—the Demon King's General—and is mistaken for the adoptive father of a demon princess.Armed with unstable “Error Magic” that lets him rewrite reality like code, Rin doesn’t want to be a hero... but when angels declare war on the demon races, and his daughter calls him “Papa,” he might just rewrite fate itself.This is the story of a broken man with nothing left to live for—until an entire world starts calling him Dad, Demon, and Destiny.

Chang An is a sub-beast who, despite having the talent for the sword, did not have the constitution to support it. And his savior, Hua Yi, is a beastman on the run for his life.

This is a story about how two once innocent children had to grow up in such a cruel beastman world.

- Description from Novelupdates