A Hentai System in the World of Danmachi - Chapter 220 - 219 - Something sweet.

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

A poor orphan, who lost both parents, stumbles upon a mysterious space and embarks on the path of cultivating immortality. From then on, he cultivates spiritual herbs, refines immortal pills, opens a shop, practices military formations, and establishes an immortal kingdom…This story is about cultivating immortality and farming, with a focus on ordinary people, not horses.

Chen Mobai, a third-year student of Xianmen No. 5 High School, is working hard to review and prepare for the entrance to Daoyuan. The direction of his efforts is: to develop a new world

- Description from novelbuddy