Turns Out I'm a Mysterious Monster

Wu Ning arranged to meet his ex-girlfriend, only to discover that she was a monstrous creature. She had even given birth to five of his children.

Afterward, he found himself in a world teeming with monsters and mysterious evil gods. Yet the people lived peacefully day after day, completely unaware that any of it existed.

An organization of supernatural beings invited Wu Ning to join them in protecting humanity and wiping out monsters, but he refused.

Because he was a monster himself.