Regression Guidelines For the Supporting Character - Chapter 312:

A skilled but unfortunate modern-day assassin was killed in a freak accident. However, he soon found himself summoned to another world by an evil wizard, who had him possess the body of a boy as an experiment. After successfully planning the evil wizard’s downfall, he used the wizard’s body as a springboard to gain influence and power in his new world.

- Description from Novelupdates

“You incompetent god! I should’ve been the Alpha with big di*k, not some pitiful Omega!”—Cherion’s death was… not heroic. Winning the lottery only to die of a heart attack five minutes later was the definition of cosmic irony. But fate wasn’t done laughing at him yet. He woke up inside a tragic omegaverse novel he once read, right in the body of the pitiful omega doomed to be rejected, humiliated, and die alone.Still, he thought, “Fine. I’ll just avoid the main plot.”Except the main plot avoided him.But the script suddenly changed!Instead of being cast aside, Cherion was married off to Zarius, the empire’s greatest war hero… and the man destined to become the villain everyone feared. A cursed Alpha, praised as a savior but fated to die by the Crown Prince’s hand.Married to the future villain? Doomed.Married to a cursed Alpha? Double doomed.No, no doomed at all! He had a plan. A brilliant, flawless, absolutely desperate plan… but still a plan!“I said I’ll help you break your curse. In exchange, you let me go. Do we have a deal or not? Or are you too insecure to trust an Omega?”“Careful, little Omega. That sharp tongue of yours is daring me to test how it tastes.”

Kyo Mazuru traveled to the world of Bleach and landed in the forest of Menos Grande at the beginning.Picking up a asauchi left over from Shinigami's death, and starting with a sword, he spent hundred years in the forest of Menos Grande to survive, slashing countless hollows, and his slashing skills reached the peak, until one day, he met a man who claimed to be Mr. Aizen Sōsuke!Mr. Aizen couldn't bear him to live alone in Hueco Mundo, so he invited him out of there and brought him to Soul Society!After that, Kyo Mazuru's Shinigami career began!

WARNING: Mature Content.He Craved Revenge.He is known to be ruthless, power-hungry, and untouchable.She never had a life of her own.She's powerless, forgotten, and unwanted.****Being the daughter of the wealthiest man in the country sounded like a dream, but to Anna, it was a nightmare.Stolen at birth by her father's mistress, and raised as the ‘illegitimate’ daughter of the powerful Steele family. She was treated as nothing more than a slave. Abused, neglected, and overlooked.Her life took an even darker turn when her half-sister chased her off a cliff, leaving her to drown in the raging river. To her family, she was dead, erased from their lives forever.Except Anna didn't die.She was rescued by a man she thought was her savior. Instead, he became her captor. Forced to sign a deal with the cold, mysterious stranger who pulled her back from the jaw of death, little did she know that agreeing to marry him would mark the very beginning of her real nightmare.****For ten years, Alexander Vaughn had one goal: destroy the Steele family. They took everything from him, now he was back to take their lives.But then, she fell straight into his grasp.Perfect.Six months. That was all he needed to ruin her, and the rest of her family.And the white-haired thing didn't fight back. She signed the contract.And that was when everything started to fall apart.