MTL - Two-dimensional Yellow Hair System - ~ dawn more

What happens when a history teacher dies and becomes a prince in another world? Of course, he becomes the greatest emperor!He will use all of his family's resources for his own benefit, conquer the world, and... beautiful women! Ahem. This is a novel full of intrigue where he will get what he wants, build his own empire, and finally protect his loved ones.He is a great leader to those he cares about, but a ruthless tyrant to his enemies. In this world of magic and mystery, he will not stop until he reaches the top.But what will he have to sacrifice for victory?

Once through the pirates, Lu En became the son of Monkey d Dragon, a grandfather named Monkey d Karp, and an unreliable and neurotic younger brother named Luffy.

Fortunately, the ghost back system is activated!

The completion of the ghost back is 10%, and the training effect is increased by 100 times!

The completion of the ghost back is 20%, and the training effect is increased by 1000 times!

…

One day, Lu En, a ghost-backed master, appeared in front of Luffy who was shouting to go to sea, and made Luffy cry on the spot.

Luffy: “The pirates in the sea are all monsters like my brother? I don’t want to go out to sea!”

Garp: “For a long time, the two boys, Long and Luffy, with small arms and calves, I really doubt that they are not my sons and grandsons. Like Lu En, they are the grandsons of the old man!”

Warring States: “The strongest creature in the sea, land and air is Kaido? No, it’s Lu En!”

- Description from novelbuddy

I got transmigrated into a game I’ve never seen before.

I thought it was a top-notch RPG and spent 30 years on it.

I retired as a war hero and planned to spend my remaining time leisurely.

But it turns out, it was an academy story?