Demon Realm United University

What? As a time traveler, I didn't go to school because my grades were last and my qualifications were mediocre. What? I had no choice but to go to the demon world to get a joint diploma between monsters and humans. As a result, I was robbed midway through school. God, can anyone tell me what exactly I am traveling through? This is a young man's adventure, I hope everyone will support it. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.