It's a one shot OVA as far as I know. There were manga but you can't find them in the United States. You get a little backdrop as to why the main character is in jail, but not much, then the story progresses into her taking back her old school from three evil sisters. Everything wraps up well for it being two episodes long, I just with there was more in genral. Saki Asamiya is a great character. If dropped into the right hands there could have been an awesome TV series. Its short, cheap, and worth the watch. I reccomend it to everyone, includingmy non-otaku friends, and they love it.