I Own EVERY Class in This World: Life Set to HELL Mode! - Chapter 390 Completing the Domination Expansion, Return to Headquarters

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.

He was once the most feared villain in the empire, a master of manipulation who wove chaos from the shadows. Ruthless, untouchable—until the day he was betrayed and executed by the very man he sought to control.But death is not the end.He awakens in the body of Lady Elara Valcrest, a fragile noble girl doomed to be a pawn in political games. Stripped of her former power, she is forced into an arranged marriage with none other than Cairon Everhart—the man who once killed her. He does not recognize her, but she knows him. And she will never forget.To survive, Elara must play a new game. One where deception is her only weapon, and trust is a dangerous illusion. She must outmaneuver her enemies, uncover the truth behind her execution, and reclaim the power she lost. But as she navigates the treacherous world of court intrigue, one question lingers—Was Cairon truly her greatest enemy? Or had she been blind to an even greater threat?Time is running out. The villain has been given one last chance. And this time, she refuses to lose.

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.

Xin Yun, a sarcastic young man, traveled to an unknown world by chance, but lost his chance to become the strongest because of his obsession with women... or sex. In a collision of the powers of nine powerful men, an incredible thing happened. Xin Yun was reborn back to the time when he traveled to the Isekai world. A fantasy journey is about to begin... [The comic adapted from this novel is popular all over the world]