History at the Library - Chapter 106

The world was cruel.....Especially for those who had lost their chances to shine.Aether was one of them....Aether, an individual born with a silver spoon, found himself discarded like a defective product. He had longed for love and tenderness, but what others showed him was nothing but pain.Even in the face of that pain, he smiled not because he wanted to, but because he had no other choice. Despite the heartbreak, he entered into a hell called society with a beautiful smile.....“Can't you do a single thing!!”“...”“You are fired!!!”“....W-Wh..”“I am sorry, Sir, but you need at least a bachelor's degree to enter our company!!”“....I-I am...”“I am sorry, Sir, but we cannot provide a loan for your ideas without reassurance!!”“....W-Why?”“I heard your father is a politician.... So, You know....”“...”After a long struggle, he finally got a job, but his brother's words rang in his ears:“Yeah, yeah… I know you got the job thanks to me, of course. So, don't ever contact me or even MY parents” his brother declared.“...Heh...”Just as he believed he had earned society's recognition, an unforeseen event claimed his pathetic, seemingly worthless life....“HONK!! HONK!!”Yet, amidst the cruelty of society, he defiantly cried,“I JUST WANT TO LIVE!!!!!”Witnessing his heartfelt cry and desire to live in the hellish place called society, he was granted a second chance.~Ding!~However, even in this new life, his situation remained unchanged. He continued to struggle not only to live and eat but also..... seduction.“HOW DARE YOU SEDUCE THE PRINCESS!!”“.....he..he... B-But I didn't seduce her!!”“HOW DARE YOU SEDUCE MY MOTHER!!”“...Hehe”“YOU HAVE SOME NERVE TO SEDUCE MY WIFE, DON'T YOU?”“HEHEHEHEHEE.....”

Karl Adelheit, a self-proclaimed ordinary student returning from military service.

And a nobleman who enlisted as a soldier and received Medals of Honor.

I exist in the darkness, disappear under the bright light, and will eventually devour the sun and turn into the shadow of all things… Known by people as the indescribable terror of darkness; the king of shadows; the dark day; the existence of the shadow of the world , is still just a somewhat special high school student, facing a weird death game…

- Description from novelbuddy

A man who was once called the world strongest agent ended up becoming a teacher after his retirement to train the new generation of agents. After many years of training his disciples, he is killed at the age of 60 by the ploy of a secret organization and was reincarnated in another world with all his past memories.Though he was surprised by the magic and the strange species of that world, he adapted very fast to his condition as a newborn and took advantage of it. He acquired special magic and gained a massive amount of strength thanks to his tight discipline in order to reach his goal: resume his career as a teacher which he left halfway through in his previous life.This is the story of a man who based on the memories and the experiences of his previous life, became a teacher who travels through the world with his new students.