IS: Infinite Stratos 2 - World Purge-hen is another fan service OVA episode about the school getting attacked once again. The girls are then sent to a virtual reality to repair the system while their mechs are under maintenance due to their previous battle against the unmanned mech.
Surprisingly, this episode wasn't that "goofy" compared to the other OVAs since the plot was somewhat serious. Also I liked how Ichika was able to rescue the girls and help the school. Other than that, the fan service was pretty much alright along with the action itself. If there's going to be somehow another OVA before a third season, I guess I'll be looking forward for it as usual. Overall, hilarious virtual reality fan service.
Conclusion: Hilarious virtual reality fan service.