Saying farewell to a classmate is never easy, but it is the reality a group of students at Kisaragi Academy must face. In an attempt to alleviate the sadness caused by their friend's departure, they perform a ritual that will bond them all together eternally as friends: the Sachiko-san Ever After charm. But after it is completed, the floor beneath them gives way and they are sucked into a gaping abyss. After getting their bearings, the students discover their surroundings have drastically changed. While it appears they are still in a school, it is not the one they know; rather, it is a run-down version of Tenjin Elementary School, the place that Kisaragi Academy was built upon after a series of kidnappings and brutal murders led to its demolition. What's more, and frightening, is the app