Twisted Wonderland Savanaclaw, 2

Yû is a high school student who is summoned into a parallel world known as “Twisted Wonderland.” During his time as prefect of the run-down residence of Night Raven Academy, he receives a request to investigate an incident. Apparently, there have been people who had the strangest injuries in the days before the celebration of an inter-residence tournament called Magical Shift. Who will be the culprit that emerges after collecting all the information?