Wistoria: Wand and Sword 5

The new, magical dungeon-adventure fantasy series from the author of Is It Wrong to Try to Pick Up Girls in a Dungeon? Seeking to fulfill a promise to a childhood friend, Will Serfort enters Regarden Magical Academy with the goal of making it to the top of the magical world. There’s just one problem: he can't use magic! Will his sword skills be the key to unlocking his true potential? THE DUKE OF THE DEEPAfter diving into the Dungeon for the All-Student Praxis, Will and his party suddenly get cast down to the eleventh floor--a place usually reserved for advanced mages. Split up during the fall, Will’s party is hard pressed to fend off wave after wave of enemies.

They finally manage to regroup, but things go from bad to worse as a portal opens to reveal a dreaded foe: a 270-credit Evil Grand Duke!