"Yes... Actually, she didn't know what to do at first, but later, she accidentally found an old photograph in the school's library..."
According to Sasaki, the Literary Girl discovered a photo tucked inside an old book in the library. The photo was very old, showing school students from an unknown time. These students had taken a picture in a strange underground space, and there seemed to be some supernatural elements in the photo.
After seeing this photo, the Literary Girl became very excited, so she planned to find the place where it was taken, take her own picture, and then enter it into a competition.
As for where that place was, the Literary Girl didn't know, but Sasaki, who had been at this school for a long time, did know. According to her, the school had dug an air raid shelter in the past, which many students were aware of. However, the shelter had not been opened for a long time...
"Then why didn't they go during the day? Or on a day off? Why insist on going at night?"
