From the anime adaption of the light novel series, Kyoukai no Kanata/Beyond the Boundary.
This video features Izumi Nase, the oldest of the three Nase siblings taking on several Youmu and dueling Miroku Fujima, an Interrogation Officer from the Spirit World Warriors Society.
I do not own any of the clips used in this video, they belong to their respective owners.
MAG.MOE - The MAG, The MOE.