A 19-year-old consciousness, a 900-year-old body. When I opened my eyes again, a man in front of me who called himself Force Ceiling told me that this was the first day of the 900th year of the new era. I came to this new world inexplicably. I entered the best high school and joined the alliance organization. The end of the world, supernatural powers, and zombies were all waiting for me to explore. Only later did I realize that the reason behind the ringing of the bell was closely related to me.