Many many things happen.
This episode was very confusing. It seemed like they could have done the whole episode without jumping from part to part. The whole overall idea was Ruby enforcing these rules and there was really no need to give the characters involved, like Gin and Neko-sensei their own parts. However I found it was interesting they did. Its not lie it was a bad thing, it was just very unexpected. As far as the episode itself, while the confusing bit give it some charm it didnâ€™t feel like it was that great of an episode. Even though it somewhat focused on Ruby and kind of her affection for Tsukune and being jealous of the other girls, it still wasnâ€™t quite as good as some other episodes.
The little segment at the end kind of surprised me. It was quite serious in its focus that something horrible and catastrophic would happen if something were to occur at the school. It almost seemed like this was setting up for the season climax where the barrier is going to be broken but everyone stops it or something like that. However that doesnâ€™t take Kokoa into the equation at all and she still hasnâ€™t gotten a lot of serious focus. Plus, from all I could tell Ruby and that other guy were trying to prevent the barrier from falling, so perhaps the only purpose that scene served was to show how Ruby got her magic back and effectively whys he is at the school. Either way it was unexpected.