George is an underachieving mage belonging to the Ex Empire's Magic Corps.

His only daily pleasure is sensing the mana of Sumire, a member of the Knight Order whom he admires, using his sole specialty: mana sonar.

And directly watching Sumire train at the practice grounds was George's solace.

That day, too, as George was happily watching Sumire, he received a summons from the Magic Corps Commander.

George is ordered by the Commander to investigate a dungeon found to the east of the Imperial Capital.

It was an unwelcome order, but upon heading to investigate the dungeon...

George's turbulent life, which begins with the dungeon investigation, now unfolds.

Also published on Kakuyomu.

[Winner of the 3rd Shueisha Web Novel Grand Prize Encouragement Award]

[Published as a book by Shueisha Dash X Bunko]