Mahou Sensei Negima! ~Mou Hitotsu no Sekai~ OVA (DVD)

Story:

 Ala Alba (plus Anya) arrives to Wales, and, after visiting Negi's sister (cousin actually), they head straight to the door that leads to the magical world, where the plan is to get as much info as possible about Nagi Sprienfield.

Unfortunately, once in Mundus Magicus, everything that could have gone wrong, went wrong: not only five students outside the group ended in the magic world, but, in that exact moment, the magical gate receives a terrorist attack led by Fate Averruncus (one of the villains of the Kyoto saga) and his evil minions. The result: Negi and company end up being sent to different parts of Mundus Magicus. This is when Negi's priority changes from getting info to find where the hell his students are, and return them to Japan safe. Although the task doesn't look easy, Ala Alba's badges have trackers that Chachamaru (the only member that ended in the same place as Negi) is able to locate, so there is hope. Besides searching and searching, Negi will enroll in a fighting tournament (with the winning prize he can release a few of his students), while trying to control Magia Erebea, a dark art able to increase power in a very significant way.

The same way STAA meant Kotaro Inugami's debut, these OVAs bring us, once and for all, the almighty Jack Rakan. Despite not having much screen time, he manages to demonstrate his insanely powers and amazing craziness. Just for this, it worth the watch.