Kara no Kyoukai Movie 6: Boukyaku Rokuon

During winter break at Reien Girls' Academy, students begin losing memories to unseen fairies. Apprentice mage Azaka Kokutou is sent to investigate, but her inability to perceive the creatures forces her to work with Shiki Ryougi, whose Mystic Eyes can cut what Azaka cannot even see.

Jealous of Shiki's closeness to her brother Mikiya, Azaka resents the partnership from the start. Yet the stolen memories conceal a deeper crime within the academy, and the two women must overcome their rivalry before the magician behind the fairies erases the truth completely.