Ore dake Haireru Kakushi Dungeon: Kossori Kitaete Sekai Saikyou

A minor noble with few prospects, Noir loses a job opportunity before it begins but retains a unique magical ability to communicate with a sage, though it causes him severe headaches. Seeking guidance, he consults the sage and is led to a hidden dungeon containing rare creatures and magical artifacts. There, he begins training to gain strength and resources, aiming to alter his future.