I watched 5 episodes of The Daily Life of the Immortal King , and honestly, what a ridiculous anime. There's no logic to anything. Random things keep happening, just like in a cartoon.
For example, if an assassin is after that girl, she shouldn't even have come to school in the first place. And what the hell is this story? The assassin is only after the girl, but there are three other people in the room with her.
The MC is the principal's teacher, so the principal didn't say anything to him. But what about the other two students? There's absolutely no logic in the story.