Is The King Of Sins The Strongest In Nanatsu No Taizai?

Although the Supreme returns in order to pass his days peacefully, he was belittled by everyone. On his wedding day, with a wave of his arm, he summoned the Nine Great Gods of War to him, who addressed him as their master…

William Mackenzie married Cassandra Wood, a beautiful young woman from a notable family. But he was seen as a useless son in law in Wood Family. Because of his job as a shop keeper, he was treated like a trash in his wife's family. He even served the Woods without any complaint. However, 3 years passed, there was a man came to him. "General, we need your power. Would you come back to the Kingdom?"

~ Ducan : Demon king ~ My kingdom is on the verge of distraction and my race is about to perish in a blink of an eye. What I need is a blessed maiden who can only be found once per hundred years. A virgin girl with the favour of the gods, who will open her legs for me In order to restore the power slipping away from me. To balance my kindom and the reels of hell, I need her to carry my seed so I could secure my position and forever rule my kind. Once my eyes are set on her, she will become mine with or without her approval, affections or consent.

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A 25 years old boy named John is suddenly shot by his friend, which results in his death, but is reincarnated again as the new Demon King. Unfortunately, he agains dies in a battle. This time also he is reincarnated but as a human. Follow Vis' adventure as he gets revenge, becomes a demon and makes his own harem.

He died killing the Demon King. He woke up sixty years too early. Now the monster is a young man. And he is running out of reasons to stay away. --- Lysan Dusk was the hero who saved humanity. He killed the Demon King, ended the war, and delivered the world from suffering, and his reward was betrayal. He wakes up in a young student's body in a dormitory room of a magical academy, and the calender shows that the date sixty years before he was born. The world outside hasn't broken yet. The war hasn't happened. Lysan's plan is to keep it that way by staying completely out of it. Fail his combat exams, spend whatever borrowed time he has left, living a quiet life, where nothing requires him to be a hero. The man who will become the Demon King, the most feared monster in history is still young and beautiful, with pale grey eyes that find Lysan across every crowded room like he is the only person worth seeing. Lysan knows what those eyes will become. He has looked into them across battlefields, spent a lifetime seeing them in nightmares. He never expected it to feel like this up close. Roman is everything Lysan was warned about — magnetic, dangerous, impossible to ignore. Everyone except Lysan, refuses to be charmed, refuses to feel anything at all. But now, he is failing spectacularly at them because Roman keeps finding him. Keeps watching him and making Lysan's carefully rebuilt walls feel like paper. Lysan knows the ending. But for the first time in two lifetimes, he is wondering if the ending can change. If the monster can be loved instead of killed. If staying is braver than running.