Way to underscored
Honestly at first it seems like random humor but the whole cartoon is put together really well, with lots of characters with their own sort of personality and background. The animation is well done as well, a proper spoof on modern anime IMO. The music you made was also rather enjoyable =D.
The detention hall looks just like the one from Breakfast Club also xD.
The only way I can see to improve is perhaps more shadows, then people besides me will vote 5 more often maybe IDK.