A fateful encounter!
In its endless war against the Demon King's army, the capital faces a
new crisis in the form of the enemy's latest general-the dark god
Wolbach. When Magumin learns of Wolbach's approach, she drags Kazuma
(against his will) to a fortress just on the edge of the front line so
they can mount a defense. But to their horror, they discover that
Wolbach is also a user of Explosion magic! Just what is this Explosion
master's relationship to Megumin..? And what could she possibly want
with Chomusuke?!