The Demon Sword Master of Excalibur Academy, Vol. 12 (light novel)

The Phillet Company, determined to complete the final stage of the Demon Sword Project, has taken Elfiné prisoner. Riselia and the others attempt a desperate rescue, but it may already be too late…Meanwhile, Leonis faces the Lord of Beasts, and danger finds its way to the once-safe halls of Excalibur Academy. As the eighteenth platoon works to free Elfiné, Leonis must make a difficult decision.