MTL - Reborn In the Tokyo Bubble Era - Chapter 51 rogue means

The young lord of a small and weak country saves a dragon beside the sea one day.

HAPPYENDING -THERAPEUTIC – SWEETANDCOOL

Lin Jiao and Gu Quan have been in a relationship for two years. For his sake, she played the good and obedient little lady, willing to be as humble as possible. She thought that Gu Quan loved her as much as she did.But at a party, she heard him say to someone, “Lin Jiao is very nice, but she’s not her.”It was only then that Lin Jiao realized how ridiculous she must seem to others. She left behind all the resentment and obsession and sadly exited the stage as he had a sweetheart he could not forget.-Later, Gu Quan was remorseful, and managed to find Lin Jiao.

He grabbed her hand tightly and said in a hoarse, pained voice, “Jiaojiao, forgive me, okay?” He was hoping that she would forgive him easily as she had always done. However, he was alarmed when a certain figure walked into his line of sight.“Darling,” he said as he pulled Lin Jiao backward, giving Gu Quan a smug look. He leaned over to Lin Jiao, touching her face softly. “Let’s continue?”

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.

A surgeon accidentally got the blessings of a system, shocked the medical industry, and rejuvenated countless people.

- Description from Novelupdates