[DeepL Translation - needs review] Volume 1 Introduction: The first novelization of the very popular manga from "Ribon"! My name is Kosen. I am a guide to the world of fear. Let me invite you to a class. Not a sleepy, boring daytime class. It is a class you have never experienced before. Another world waiting for you with a wide-open mouth in the midst of your ordinary life. Why don't you come and see with your own eyes what awaits you beyond that point? Now, let's start the class of fear. ....
