Closed School

Many years have passed since the events at the now-famous School No. 50. Every student in this city knows about the fears lurking within its walls. Sonia, a student of class 7B, was a very lonely girl. She often complained to her parents that she was being bullied at school, complained to teachers, to anyone who might help her, but no one cared. And when she was bullied once again, the school burned to the ground, and the kids responsible for it burned with it. No one ever found Sonia, and rumors began to spread that she is still there, in the burned school, but no longer alone. These rumors did not deter you, professional paranormal investigators, who have come to this city specifically to investigate the case of the closed school. There was a similar group before you, and the materials they collected amazed the world, but none of the group returned. So who published these materials and why?