Not too bad
The weakest point of this is probably the animation and how it does look kind of cheesy. However, it was great of you to include all of those voices. The best part might be the overview of the school at first, especially how it has the best animation. It does not need to have a lot of action, just a pretty interesting real life story. I can tell that it is an early production of yours (first with lip sync) so it must be great to have so many people willing to help. The characters do not seem particularly bad or poorly developed.