KO One: I'm the Demon Lord, So Why Am I Teaching at KO One?

Luo Yu transmigrated into the world of the Ultimate series over a hundred thousand years ago. With the power to demonize ability users, he became the supreme ruler of the Demon Realm! The entire Demon Realm and the Twelve Time-Space Realms trembled before him! He was also known as the most powerful Demon Lord in the history of the Twelve Time-Space Realms and the Demon Realm! Under his rule, the Demon Realm and the Twelve Time-Space Realms enjoyed a thousand years of peace!

But after a thousand years, he grew tired of his position as supreme ruler of the Demon Realm. He left the Demon Realm and went into seclusion between the Twelve Time-Space Realms and the Demon Realm.

Over a hundred thousand years later,

Luo Yu became a history teacher at KO One, teaching his students a history lesson.

Just then, Black Dragon, seeking to become a demon, set his sights on KO One...

At the same time, the Demon Realm of a hundred thousand years later began stirring once more, planning to conquer the Twelve Time-Space Realms...

When the Demon Realm descended...

A figure walked out of a classroom at Balley High School and stood before a million-strong army from the Demon Realm.

At that moment,

the Demon Realm's army all fell to their knees.

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.