Gaowu Started School and I Became the Dormitory Manager of the Whole School

The "Guixu Taoist" who once stood on top of the world and sealed the demon god, in order to earn tuition for his sister, disguised himself as an ordinary dormitory master, checked the dormitory with a thermos cup, repaired the water pipes, and did all kinds of chores, but he solved world-class crises such as out-of-control S-level powers, obsession, and invasion of demons from other worlds.