From the start, an ordinary person transmigrates into the Lord of Myriad Worlds City, a hub at the center of the vast universe. He must govern the city while always facing the threat of attack from powerful enemies.
Fortunately, he awakens the Myriad Worlds City Management System, which lets him invite powerful beings from across the vast universe to become residents!
Starting as the weakest Lord of Myriad Worlds City, he develops the city from scratch and leads its residents in fending off enormous disasters from the dark side of the universe, including the collapse of dimensional barriers, the apocalypse, and evil gods!
This novel and its characters are entirely fictional. Any similarities are purely coincidental. Do not imitate.
Eunuch? It's well written.