When blood flows in the class 3 homeroom, the students realize that the calamity has not stopped. The "charm" is called off, and the students begin to wonder who among them is actually dead. Meanwhile Kouichi learns that, 15 years ago, the calamity started but then stopped in the course of the year. The librarian Chibiki tells him that class 3 had visited Yomiyama Shrine on a class trip during summer break that year...