Having said that let's get to the point...or lack of it, in this case. This short animation is pointless and plotless. There is no influence on the OT series plot.
It's a sketch type of thing. It was meant to be funny, using one of the comic relief characters (Marie) from the series as a main character of a (really) short animation...but it doesn't succeed on getting you to actually laugh (well, at least not in my case). Besides, most of the lovable characters of the series don't even make an appearance here.
Watch it if you are a fan of the Onegai Teacher series...if you're not, I don't see the point really.
