Collect a Rent and I Will Become the Strongest and Weirdest?

Urban + Weird + Mysterious + Relaxing Grandpa's sudden "death" caused Jiang Chen to lose his only relative in the world. When sorting out his grandfather's belongings, Jiang Chen noticed several real estate deeds placed under the bed, as well as a note left by his grandfather. Under the guidance of his grandfather, Jiang Chen opened the door to the other world. But when he went to collect the first rent, he realized that his tenants seemed not to be human beings... But after getting along with each other for a long time, these tenants seemed to like Jiang Chen more and more. What's more, the rent here doesn't seem to be money, but a wisp of ghost energy and blood. The displeasure of reality and his grandfather's last wish made Jiang Chen stay in the other world. But a few months later, when the first player entered the other world, Jiang Chen realized that this place was really a copy. But what Jiang Chen doesn't understand is why those weird things that scare players are actually his tenants.