Demon Sword Master of Excalibur Academy, Vol. 9 (manga)

Leonis and Riselia finally reunite amidst disaster in the imperial city. And although the Voids are being pushed back, they have a new problem: Leonis's minion, Rakshasa Nightmare. Meanwhile, Prince Alexios, hoping to defeat the Voids once and for all, searches for any surviving Dark Lords and unwittingly contacts Leonis! During all this trouble, a mysterious person known as the Queen of the Realm of Shadows plots from the dark...