Thrilling survival, what the heck is this "many children, many blessings" nonsense?

Billions of people on Earth were transported to a terrifying world, where survival depended on earning enough ghost coins through assigned industries. While most others struggled to survive in fear, Lin Yuan, aided by his talent, had already transformed his dilapidated inn into the world's premier hotel. A noble and elegant vampire countess was a regular at the Yellow Springs Hotel, constantly clamoring to take Lin Yuan home to meet her family. A yandere succubus lord considered Lin Yuan her possession, constantly plotting to kill every woman around him. Even the ghost bride, who loathed Lin Yuan's promiscuity, couldn't resist staying at his hotel. ... Lin Yuan: "Ugh, my old back! How did this survival game turn into this?"