I Became a Mafia in the Academy - Chapter 55

The unparalleled Demon King Ye Xuan, who was able to heal the death or the living alike and holder of the medicine Holy Scripture, was betrayed and killed by his fellow Demon Kings. But he reincarnated into the body of Ye Xuan, the prodigal son of the Ye family and vowed to himself that he would return to his peak and take back everything that belonged to him!

- Description from Novelupdates

Seo Tae Hyuk, jailed after being falsely accused.

In a world where Taming Beasts determine strength and destiny, Leonhardt Valtara is reborn as the heir of the most feared villainous family in history. The Valtaras are ruthless, powerful, and utterly devoted to their own—especially to Leonhardt, their beloved son.But his greatest surprise?He is married to Celestia Nightshade—the Number One Villain, a peerless beauty, and the most genius Taming Beast Master of her generation. Feared by the world, Celestia wields unmatched power, yet behind closed doors, she is the most doting wife, willing to burn kingdoms if it means protecting Leonhardt.However, fate has already written his downfall.The original protagonist, Rael Ascarion, a rising hero, is destined to gather allies, defeat the villains, and restore “justice.” By his side is Evelyn Astralis, the heroine meant to love him. According to the original story, Leonhardt and Celestia are fated to lose.But why should he follow a script that leads to his destruction?With his reincarnated knowledge, Celestia’s overwhelming power, and his first beast, Ironhorn, the Indomitable Rhino, Leonhardt will crush fate itself and carve his own path.If the world wants him to be a villain…Then he will become the greatest villain of all time.