On a typhoon night, an old school falls into another world, and the students must survive by following the rules.
Core Rules: The Thirteen Rules of Night School
1. After 22:00, only use the third floor when its lights are on.
2. If you hear the broadcast call your name, do not answer.
3. Anyone wearing a red uniform is not a student.
4. The cafeteria only serves plain rice and greens. If you see braised pork, close your eyes and count to ten.
5. Do not use the third toilet stall.
6. If your reflection in the mirror blinks, smash the mirror immediately.
7. When the homeroom teacher takes attendance, anyone absent must answer.
8. Do not borrow A History of Night School from the library.
9. During the flag-raising ceremony on the sports field, there can only be one flag in the sky.
10. The infirmary does not treat the living.
11. Do not trust teachers wearing school badges.
12. Collect all thirteen school badges to leave Night School.
13. Do not celebrate your birthday at Night School.
Hidden Rule Fourteen
Do not trust the night watchman.
But the night watchman was once a student, too.
