Let me start with emotions...

Logically speaking from my side, I want to find a shelter in this school, because the road to the rooftop is blocked, and I came to the rooftop by some means. Now I found a diary, and then there were some horrible things on it. When I finished reading it, just in the middle of the night, there was a strange cry in the music classroom.

If we look at the logic of Daoism...

The school didn't know what had happened. It was abandoned anyway. The security guard probably came to the music classroom at the end of his diary. Later, the Daoists found some...