In the Second Generation of the Trench, He Changed To the Ruanfan Script - Chapter 13:

On this continent, all creatures had a chance of evolving into dragons.

It was said that every life had their own Dragon Gates. After crossing it, they’d become like the sun and moon in the sky, dazzling gloriously.

That also applied to humans.

Humans’ Dragon Gates were becoming Dragon Tamers.

Searching everywhere for young spirits close to dragonizing, and training them into unparalleled Dragon Kings!

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This is a very serious Xianxia book, but why the introduction I always want to describe it as: My second child is a giant, and there will be something going on in the future, and so on.

In short, you will understand after reading it, this is really not the YY of male species, what is missing, what is missing, etc. I am telling the truth.

- Description from novelbuddy

There’s the so called class transfer.

Among the high school students that were given cheat abilities, Kirishima Ran was given 『Underling Training』for some reason, a skill that can make a woman a slave.

Ran who was driven out by the kingdom using an absurd reason will make use of the given skill freely to take revenge on his classmates, release his desires (This is mainly the reason), and fight off the world’s system.

It’s a story of him using his wonderful skill making his classmates turn to an obedient cute and lewd slave.