This Witcher Is Too Upright, Right?

As a former member of the demon hunting team, high school student Lin Zhao lived a life of poverty with his sister Vanilla after the team was disbanded. He originally thought that life would continue like this until one day, he accepted a commission and sneaked into Seven Star Academy as an undercover agent. "Wow, this brother is so handsome, he is actually a demon hunter!" "Brother, you are too upright! Don't worry, I'm not a bad person. I just want to be friends with you!" … "Lin Zhao, wake up, stop being lazy and work quickly, the army of monsters is coming!" "I understand, hold on first while I go to the toilet. Don't worry, I promise not to run away... That's weird!" Turn this broken world upside down!