The characters are fun. They are not (too) shallow, even if they have strengths and weaknesses. I like the protagonist. His struggles with teaching and growth from interacting with the students are fun to watch. It's not an isekai. This is set in a fantasy world and has a fairly standard school setting you have probably seen before. The main draw for me is the characters and their interactions with each other. If you like this type of series (I do), it's genuinely good, but it's not the most original series. I cannot say for certain if I'll keep liking the series as it isstill ongoing and therefore can still butcher the ending.