Wistoria: Wand and Sword 6 (manga)

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?DOWN BUT NOT OUTWill's dreams of climbing the Tower are shattered after he fails to pass Professor Edward's final exam, leaving him short on credits. He goes off on his own to brood, even as the rest of the school prepares to ring in a new year at the Barrier Festival.

Suddenly, the revelers come under attack by a host of demons. Will takes up his sword once more and rushes headlong into peril to save his friends.