It was ok. This is a non-canon work set between season 1 and 2. It was fun to watch, but nothing substantial nor additive to the series. What most would consider "fanservice". If you're a fan of the series and want a lil more, this is it, but as something concrete to the series, it didn't add nor take away anything from it. Overall enjoyable, but rather forgettable. Would not recommend if you're not a big fan as it would just feel like a whole load of nothing sandwich. I would put this on the same levels as the Hot Spring OVA and the BeachOVA, although those are much funnier. Namako desu, kimoi desu.