What a cute short! I really enjoyed Tonari no Seki-kun!
Seki-kun sits next to Yokoi in class. She always notices him playing around (and the ridiculous games he invents are dee-lightful), and thinks she should be scolding him...but then she gets sucked into his games and ends up being just as distracted as him.
So, yeah, hilarious. And not long enough to become annoying.
If you like shorts and comedy, this one will be a solid choice.