Not (Just) A Mage Lord Isekai - Chapter 1 - No Good Choices

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.

The sky was painted gray forever. The light of the sun was restrained. The darkness of the night was deeper than ever. At such a time, he belonged to a class people didn’t even recognize as ’human’. He was at the bottom of the social stratum, a slave. And when his only family was taken away from him... he no longer had a purpose in life. Yet, he clung to life because of his promise. And he set an impossible goal for himself, just so he’d have an excuse to live. When he finally reached a place he never expected to be, in pursuit of a purpose he expected to fail and die miserably trying to fulfill... he awoke to a night that would change his entire life. He was an insignificant fly, a mere speck in the destruction of the Empire. But he... survived. And, despite being a slave, he gained the blessing of a king. Or rather, the curse...

There’s SIS in great Britain, CIA in the US. In Huaxia, there’s Dragon Division, known as the mysterious power of the East.

Three years ago, President Qiao did not hesitate to sign the papers when Xia Ning placed the divorce papers in front of him.

Three years later, she is an up-and-coming star in show biz; watched by the public but knee-deep in scandals.

He is a resolute emperor in the business world; powerful and omnipotent.

Their paths were supposed to be separate and independent, but—

Standing at her door, the legendary ruthless and unyielding diamond bachelor asks for a remarriage. A cute bun appears from behind and gazes at Xia Ning with his big, starry eyes. “Mummy, Daddy will cook, I will warm the bed, please take us in.”

- Description from Novelupdates