Apocalypse of the Demon Lord

(One heroine, ensemble cast, invincible protagonist, no System)

Standard version:

Among heaven and earth are cultivators known as Spirit Cultivators.

Across the Myriad Worlds, cultivation methods vary, so for convenience they are divided into ten ranks: Spirit Adept, Spirit Master, Spirit General, Spirit Marshal, Spirit Saint, Spirit Venerable, Spirit King, Spirit Emperor, Spirit Sovereign, and Spirit God.

Shanhai Realm, Year 156 of the New Calendar

This was the 156th year since the spiritual qi revival. That year, the Human Alliance discovered a fourth source of spiritual energy, as well as a powerful organization that had never appeared before.

That year, the invincible Huang Qianming had a dream, a dream about a war between gods and demons.

When he woke and saw his kind mother, his close-knit brothers, and his own invincible self, Huang Qianming reflected that life was pretty good just as it was.

That year, Huang Qianming was told he had to enroll in school and become a high school senior. Though he was unwilling in every way, he had no choice but to accept a student life in which he would be forced to show off his power in public.

…

Many years later, as the Demon Venerable Huang Qianming sat high upon the Throne of Chaos, he still thought of that dream and of his days as a student. They had been the last happy times of his life.

Literary version:

What is a Demon Venerable?

A snake-hearted hypocrite, a fraud who deceives the world, a ruthless villain?

Greedy and insatiable, sinister and cunning, shameless to the core?

A butcher of innocents, a persecutor of the loyal, one who repays kindness with betrayal?

No.

It means doing whatever one pleases, without restraint.

It means regarding all creation as straw dogs.

It means standing above all, yet being utterly alone.