From the back of the book:
The four knights of destruction, they come accompanied by fear, devastation, and death.
Appearance of a scenario supplement
The appearance of a scenario supplement for the present day magical fantasy RPG "NIGHT WIZARD The 3rd Edition" presented by Takeshi Kikuchi. This book records 3 scenarios whose theme are the invading demons called "the four knights". Through these scenarios, the wizards step deeply into the schemes of the destruction of the human race surrounded by the four knights. It also includes detailed introductions and explanations of the four knights and their servants for the creation of original scenarios.
Scenario creation tool
The book contains rules and charts for the creation of scenarios, as well as templates for boss characters and enemy special skills. In addition, a chart for the conception of NPCs for usage in scnearios as well as templates for scenario creation have also been prepared. Putting these to use, you should be able to generating scenarios via building blocks.