Gekou Fukanou

Summary

Class 2-4 was assigned to prepare for the school culture festival inside the old schoolhouse, known for being a difficult place to prepare in. But suddenly, strange monsters appear and attack the students! They try to run away in a panic, but the way out is locked shut! Inside, one of the students finds an old journal. And that journal happens to be the journal of the "Great Count" that can grant any wish―!?