It's Actually Not Easy Wanting to be a Supporting Male Lead - Chapter 18 part4

What are the odds that Zavian, the son of the devil, would fall for the only woman whose destiny is to destroy him?

In the beginning of time, war broke out between the fallen angels and the devil, and the devil was defeated and cast into the underworld. During the war, Zavian, the devil’s son, turned against his father and joined hands with the other demons to defeat him, which made the devil kill his son’s wife as a punishment for betraying him.

But 500 years later, there appeared a woman slave who looked exactly like his wife, and Zavian, who had longed for his dead wife, couldn’t help but get drawn to her.

But the devil had other plans for his son. To return to earth his son has to die. Is the queen’s doppelganger part of the devil’s plans?

Would Zavian fall right into his father’s trap or has fate got other plans for him?

…

Everyone stood before the king, the high and the low, with their heads bowed. This was the day they had waited for, for centuries.

King Zavian was finally getting remarried.

To strengthen the bond between the seven kingdoms of the earth, Zavian was to get married to one of the beautiful princesses standing in front of him.

But his eyes were drawn to the lowly maid standing afar off. The witches had warned him about her, and he knew he shouldn’t be with her, but she was something he couldn’t resist. The more he tried to run away from her, the more drawn he was to her.

Even though everything in him screamed not to, Zavian stood up and walked past the princesses in front of him and to the maid;

She was tiny in her dress, and her whole body trembled as he approached her, her eyes pinned to her feet, afraid to behold his face. He smiled as he held her face, tilting her head to look at him;

“Neera, will you be my queen?”

And that was when all of hell broke loose…

.....

Name: ParadoxSpecies: Snake, ?Description: A tiny snake with great potential.That was who I was. That was what I was. A tiny snake with great potential. The sole creation of the Great Core.It was just us, the Great Core and I, tucked away in our little corner of the World Dungeon. Together, we hid from the bad-things and the Coreless of the world outside - safe from the horrors that would consume us.Until, one day, the Coreless found us. Until they tried to steal away my creator. Until, with no other option, I swallowed the Great Core that had made me.Only after that did I become what I was always meant to be.At last, I became the Great Core's Paradox in more than name.[The Endless Cycle] began.Thus begins the story of a little snake zealot and his journey to greatness.

A continuation from where High School DxD Volume 25 left off.

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.