Secrets of the Silent Witch, Vol. 6 (manga)

Monica, Casey, and Cyril head to a storehouse to take inventory of the raw materials for the school festival, but when a pile of wood collapses, Casey narrowly avoids taking a hit. Moreover, there are signs that the ropes around the materials were cut with a knife! Monica takes the trembling Casey to the infirmary, but she realizes that something feels off. Her friend s expression changes, and Monica must make a decision...