The Demon Sword Master of Excalibur Academy, Vol. 10 (manga‪)‬

The Kenki Gathering’s plans are in motion, and the Seventh Assault Garden is to become their sacrifice. Sakuya gives her all to fight back, but nothing can prepare her for the familiar face she finds beneath her opponent’s mask! When it comes to unexpected reunions, though, Sakuya isn’t alone. With the fate of his kingdom and everyone he’s grown to love on the line, Leonis must confront an old foe he knows all too well—and resolve a thousand-year-old grudge!