After his eventful trip to Kyoto Negi finds himself sent out on another mission to investigate strange magical readings in Tokyo with Mana Tatsumiya. It's just a simple observation mission, What could possibly go wrong?

Two mages are dispatched to Earth to prevent dark forces from being able to take over Mundus Vetus, and by proxy, Mundus Magicus as well. Will their presence be able to aid the Senshi in defending Earth from the dark forces?