Elf Tensei Kara no Cheat Kenkoku-ki - Chapter 14Book 4: -2: Defensive Wall

In a world dotted with World Entrances to a demon world, demons have invaded humans for centuries. Humanity has united and one of the most ancient sects in the world, the Archean Mountain Sect, has set up an entire education system in the form of Dao Academies and defenses at the World Entrances.

“Compared to our time, the current generation just aren’t as reliable” they said, “Still, isn’t he the son of the Hero?” How annoying.

It’s been over ten years since the battle between mankind and the demons ended. The children of the heroes who saved the world are all grown up.

One of them, Earth, was a talented man, and everyone expected him to succeed his father as a warrior and defend his country, but Earth was always wary of his father’s title.

One day, Earth is shocked to find his father’s sword, which was used to overthrow the Demon King, sealed in his family’s mansion.

Because trapped within was the ghost of the Great Demon King who was unable to pass on and continued to roam the world.

For some reason, only he could see the spirit of the Demon King, and the Demon King possessed him through the sword.

Every day, forced to coexist with the spirit of the Demon King, they live a strange shared life, when the Demon King whispers to Earth on a whim.

“I have a grudge against your father. If you want to get back at your father and the world, I’ll train you. I’m free.”

Earth receives special personal guidance from the Demon King just to get back at his parents and the world.

Then, in the coming days. The hero’s parents, the heroes of the past, the first love, the princess childhood friend, the geniuses of the era, and the world will tremble.

[Fireworks in the world are the most soothing to the hearts of mortals!]

“There is no temple at the age of eighty-two,”

“Sixty-nine years of worry.”

“The world is hard,”

“Long life is not easy.”

“Yin and Yang are reversed in a dream, and in the next life… I beg!”

【Name】: Lu Chen

[Identity]: Master of Changchun Temple

【Repair】: None

[Cultivation method]: Immortal Changchun Kung Fu (can be upgraded!) +

[Spell]: Control swordsmanship (upgrade conditions can be expanded!)

“Expand!”

“upgrade!”

……………………………..

PS: Upgrade, relax, cultivate immortals, demons, ghosts…

- Description from novelbuddy

I have experienced all the eight sufferings of this world.

I do not ask for nirvana, but for you.

Wild and hard-to-tame demon (gong) x cold, ascetic and childish immortal (shou)

- Description from Novelupdates