Yunni was the sect master of the Radiant Rainbow Sect. After countless battles between the righteous and demonic factions, he rose to the top of the Immortal Alliance.
Then his wicked disciple, who had climbed into his bed, killed him.
The wicked disciple said women who ruled were an affront to nature, and that a woman was unfit to be the ruler of the world. "Master, I only have your best interests at heart. You should retire early and get some rest."
Yunni smiled. They said that lust was a blade above one's head, but he was going to screw the wicked disciple's ancestors for eighteen generations.
Many years later, he was still an eternally youthful little immortal, while the wicked disciple had become an old geezer who refused to die.
He climbed out of his coffin and slept with his wicked disciple's disciples' disciples, generation after generation.
Content warnings:
1. The bottom is a promiscuous, bisexual playboy with countless lovers in his past life.
2. The top is a hypocrite and a mad dog who appears noble and upright. He has many separate incarnations, but they're all the same person.
Theme: If you can sleep with them, you've already come out ahead