Demon Lord  

Kanchigai no Atelier Meister: Eiyuu Party no Moto Zatsuyougakari ga, Jitsu wa Sentou Igai ga SSS Rank Datta to Iu Yoku Aru Hanashi

On one occasion, a young man named Kurt discovers that he has been expelled from the Hero's Party because he lacks combat skills. Despite this setback, he finds work as a castle wall repairer and mine...