In spite of the proven presence of traitors in Akademeia, Kurasame opposes the establishment of new surveillance devices to the questionable ethics. But by relying on Urushi, who supports him in this way, he made a terrible mistake: while the aspirant had entrusted him with the custody of Aoi before embarking on a non-regular mission, the young officer turns out to be a spy on the pay of Militia! Kurasame's choices have endangered the lives of many people, including Commander Takatsugu. Will the student be able to save the master?