Let's face it, if you watched the series you'll watch the OVA too no matter the reviews. So I am mostly writing this for people that want to compare opinions after watching, and not those deciding whether to watch. Part 1 - score 8 - Good for those looking for the pantsu/nopan lewds/jokes, a bit more intense than the main show Part 2 - score 5 - Zelda backstory, may be good for some diehard fans or manga readers, but a bit pointless for me personally since its an unimportant side character Part 3 - score 8 - Shows the circumstances around the onee-shota rape scene hinted bythe main story, a very important and controversial plot point so I rate it high. Not really showing anything interesting about it in the end, more like just trying to silence those complaining about it by saying "hey it wasn't as bad as you imagined". Takes away the potential of the show's doujins :p

A very unbalanced combo, the parts really don't fit well together, but I'd still say it's good overall.