The Simple Life of Killing Demons - Chapter 78Book 12:

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

The protagonist travels through Shu Mountain and becomes a demonic dragon guarding the heavenly book in Dinghu Peak.

On the will left behind by the 14 year old suicide victim K:

“Taku Sugawara is the devil. Nobody should believe his words.”

On a sunny afternoon, Kyle finally received the long-awaited acceptance letter to Hogwarts, the prestigious thousand-year-old wizarding school.At Hogwarts, Kyle led a fulfilling life. Besides attending classes, he spent his free time cultivating magical vegetables, tending to enchanting flowers, or venturing into the dark, forgotten chambers of the castle to provide emotional support to a small creature abandoned for centuries.Dumbledore: “Kyle is a courageous, kind, and sincere young wizard.”Professor McGonagall: “The Headmaster is absolutely right. Kyle never breaks the school rules.”Snape: “Ah, yes… indeed...”Professor Quirrell had thought the same—until one day, he opened a trapdoor and stumbled into a room full of Chomping Cabbages.