915 Morning Post

The male protagonist is a mathematics teacher in the high school section of a middle school. He keeps going back to the previous day because of a newspaper on the morning of September 15th. The seemingly unsolvable cycle took a turn after the male protagonist met a junior high school student who was also trapped in the situation. The male protagonist gradually discovers that all this seems to be related to a fire in a building in the same city reported in the newspaper, and the student's sister was the victim in the fire. The two work together to find a breakthrough, try to prevent the fire, find out the truth, and escape from the cycle. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.