Ultimate Demon Hunting Academy

In the black dead realm, monsters appear. Eat the human body and soul. For thousands of years, human society has never stopped resisting the invasion of monsters. In ancient times, there were the Demon Suppressing Office and the Demon Suppressing School Captain, but now there are the Demon Hunting Academy and the Demon Hunters. Although the names are different, the responsibilities remain the same. That is to protect human beings from living a stable life under the threat of monsters. Are you all invited here by the Demon Hunting Academy? Why was I kidnapped?