How many extras does the Railgun anime have? Ok, at least this is a full episode with a completely new story by itself. I'm not sure if this story is present in other forms of the Railgun media though. There isn't any real difference in animation quality compared to the main series, but it's still very good. I didn't pay full attention to the OP and ED songs but they have a similar feel to them since the songs are by the same singers... JC Staff must have a good budget to use new songs just for a 1 episode OVA. The episode's also slightly longer(34 minutes) but that about it; it feel just like any other Railgun episode.

I don't wanna spoil the story, but I like the pacing even though there's a full plot in just one episode. The story quickly goes into the problem Misaka faces and it's pretty cool to see her awesome abilities in all her glory. I actually wished that episode could be longer.

I liked it, but I could only recommend it as much as the original season.