Onegai Teacher is an excellent anime except for one thing...the voice of Kei is pretty grating. He sounds like what I imagine Piro from Megatokyo would sound like were that turned into an anime...just kinda whiny all the time. So, if you don't mind hearing someone say "sensei" a billion times per episode in a whiny voice, you'll like this anime. Actually, I like Onegai Teacher despite all that. The music, animation, seiyuu (minus one) and characters are all excellent. At 13 episodes it doesn't drag the story down or suffer from too much padding. If you're looking for a nice dramedy then be sure to check this one out.