A group of students were inexplicably transported to another world after taking their high school entrance exams. This is a very large basement, estimated to be as large as the entire city. A central hall is a library. It's safe inside, safe at certain times. Dungeons will appear inside from time to time and must be entered. There is a quaint old city, a fantasy country, and even a school where they have lived together for more than a thousand days and nights. Students kept dying, watches were always broken, and nightmares appeared whenever I fell asleep. And there are monsters wandering outside the library. What should they do if they have never experienced any storms?
After much thought, I decided to write a book that I have always wanted to write. I will update it as the occasion arises.
Intention: Explore the unknown world and observe every detail.