Beast taming, starting from zero point - Chapter 222 - 210 The Glasses Cracked

A man who was once called the world’s strongest agent ended up becoming a teacher after his retirement, to train a new generation of agents. After many years of training his disciples, he was killed at the age of 60 by a secret organization’s ruse and was reincarnated in another world with his memories intact. Though he was surprised by the existence of magic and the strange species in that world, he quickly adapted 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 rigorous 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 students.

"I hope my wife liked the arrangements... for the wedding night."

After breaking up with his girlfriend, he accidentally acquired a genius system and rose from there against the heavens, becoming invincible..

- Description from Novelupdates

Noah was a nobleman. An orphan.Born with an empty constitution, he was pretty much useless…Until he realises the World’s Greatest Secret.The verse they were living in—It was a freakin fantasy novel.And the worst part?He was supposed to be the villain.***“Hehehe— So what? I just have to substitute someone in my place…Yes!”“All I have to do is to hire a Villain.”