Grandpa Yu often nagged in Yu Zhen's ear, saying that inside his body was the Remnant Soul of a Great Power. If he didn't cultivate properly to fully nurture the Great Power's soul and send it away, he would probably remain single for life and be reincarnated as an animal in his next life. Yu Zhen, playing on his phone, nodded along. On the surface, "Uh-huh, uh-huh," but in his heart, "Hahaha." He thought to himself that his grandpa was really cute, telling the same lie for decades without getting tired of it.

A few years later, Grandpa Yu passed away. A cold-faced, handsome man radiating an immortal aura arrived at his doorstep in a luxury car, holding a household registration book.

...

Yu Zhen: The Remnant Soul in my body has resurrected to collect a debt, what should I do? Waiting online, urgent!

PS: Modern Cultivation! Marriage first, love later! A modern alternate universe setting where same-sex marriage is legal!