Bleach: Teaching Makes Me Stronger - Chapter 221: Skipping Class

It’s a story that happened long, long ago, in a continent far, far away, about gods and mortals, sword and magic, war and peace, and of course love and hatred.

Amon was a poor miner’s son in a remote town in the kingdom of Hittite. Along with the discovery of a marvelous gem, his fate was changed. People on this land called it Gods’ Tear. But wait, what were the gods? It was said that the gods created the world. Then who created the gods?

Forced by the tantalizing fate, Amon had to struggle to find out the truth behind this world of magic and gods……

- Description from Novelupdates

While reading a book, a sparkle of light disappeared. And, as it did, a message appeared.

'Confucius spoke not of the bizarre, the valiant, the rebellious, nor of spirits and demons.'This is the story of Mok Gyeongwoon, AKA the First Heavenly Demon - Cheon Ma, the forefather of the main character of the popular novel and manwha Nano Machine. This story is the prequel to Nano Machine, taking place 800 years earlier.

A tree of 10,000 flowers, the world is the door.
The spells change a lot, but the hearts of the people are unchanged.

- Description from Uukanshu translation