One Piece : Marine of the Straw Hat Pirates - Chapter 138 : Time Travel

A perfect exercise has created a mythology academy that makes the heavens and the world tremble.

The invincible dean leads a group of teachers and students who are not afraid of the sky and earth to compose a myth together!

When hundreds of millions of years have passed and he is no longer in the world, there is one title that still makes the world tremble: Dean!

- Description from novelbuddy

In the legends that were told, ten thousand years ago the twelve demon kings wreaked havoc upon the world, almost completely destroying it. Ten thousand years later, the late arriving Bella discovered that she had been screwed over by her reincarnation, the ranks of the Saviors are already filled and she has to change teams in order to pass the days. Having her gender changed into a beautiful girl… she endured that, not being able to join the righteous side and obtain cheat abilities… she endured, but what she could not endure, was that the world that she had transmigrated to was toxic beyond belief. No one here does their rightful jobs properly, be they heroes, demon kings, or creator gods… in fact, Bella felt as if they all had also started with the wrong faction!

“Why don’t wizards just shoot each other with guns?” many people on Earth wonder.When Reynard died on Earth and was reborn in a world of magic, he became nobody. He had no parents, no system, no special bloodline, and a magical aptitude that only let him advance in magic by consuming expensive materials. Materials that he could never afford!So instead, he crafted a gun.Oh, you want to cast a spell?Then I cast bullet!From the most hopeless student, Reynard turned into a feared magus. But his path to riches and power was still full of peril!“Ah… why can’t I just stop pissing off wrong people and seducing wrong girls?”

Traveling through the era of national beasts, Su Yi discovered that his pet beasts could actually choose a special evolutionary route!

When others are still trying to make the red fox evolve into a flaming fox, his nine-tailed fox fairy has already fallen in love with Liaozhai;

When others are still trying to make the thorn grass evolve into a thorn tree, his queen of thorns has already suffered from secondary school;

…

Looking at these strange beasts, Su Yi fell into contemplation.

Will I still be a beastmaster in the future?

This is the demon!

- Description from novelbuddy