After My Roommates Disappeared One After Another, I Raised a Kid as a Babysitter

Three college students in the same dormitory disappeared one after another. The truth was that they had gone to another world and became sacrifices in some mysterious ritual. Finally, it was Wang Heng's turn. He survived with the help of a kid, and the two escaped from the predicament together and returned to campus. But this is only temporary. Every seven days in the future, he will be dragged back to another world to be tortured until death, like a curse. From then on, he provided energy and blood to the little ghost, and the little ghost provided mana support to travel back and forth between the two worlds. Purchase arms in the city, bring them to other worlds to fight monsters, upgrade, and break curses, and then plunder treasures from other worlds, and bring them back to the city to become bigger, stronger, and powerful. May I ask what celebrities and rich people do raising little devils? Scare people and make them sick; steal people's wealth and peach blossoms; spy on other people's secrets; powerful little ghosts can also ward off disasters for you. Wang Heng didn't take it seriously, that's it?