You could call this the second season, but not really with only two episodes it never really sum up the story... I'm gonna assume that who ever is reading this has watched the first 12 episodes, if not you should not read further till you do, because this may contain spoilers. Anyways as you know the white Kampfers enter the battle and it ends off with them retreating at the end of the 12th episode. Well only episode 13 has the same story, but it also leaves it hanging. I've looked it up and it seems like there's no continuation pass this anime wise
at the moment. thee might be in the near future. Tho the manga may have a continuation its something you may want to look at if your still interested in seeing how this ends. On the other hand, episode 14 has nothing to do with the main story. Since these were consider OVAs, it doesn't really have to follow the main story. I still enjoy watching them, but just the cliff hanger kinda made me mad. If you enjoyed the anime up to this point tho, you'll probably enjoy these last few episodes, especially episode 14 ;D
A small continuation to the original 12 episodes. It's good and apparently contains a lot more fanservice scenes than usual. This will not disappoint Kampfer viewers at all. There's no ending to the series but who cares. I honestly would like more Kampfer episodes.