It tells the story of a 20-year-old boy who traveled back to vocational high school and had the same friends, but completely different things happened. The school also became a prison. He used various means to escape from the school and tried various methods. However, he found that the outside of the school had long been in ruins and various ancient ruins. My friends and I didn't know if we could return to the original world.
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.
