Story: The mom is beast at putting these you together and she is hot as hell
Animation: To me it looked a little better but I could be wrong \(^_^)/
Sound: Spot on
Characters: out of this world Hatsuho KAZAMI she has the stuff god dam is she hhhhhooottttttt and same goes for Mizuho KAZAMI she has her stuff to, Mizuho KAZAMI little sister Maho KAZAMI is funny as hell lol.
I must say that all that I wrote on my review about the series Onegai teacher applies to this OVA. There is no significant change. I thought the animation was a bit of a step down from the series, though. BUT nothing dramatic.
Kazami sensei's mom is still a "WTF?!" character to me. But there is nothing really bad to say about this OVA.
Overall I really enjoyed this OVA it was a nice closure for the series and very fulfilling. I'm not an ecchi fan, but I actually like that we get to see Kei and Mizuho relationship get deeper ( I also enjoyed Kei finally calling his wife by her name).