The Hidden Dungeon Only I Can Enter (2021)

S1E1 Powerful Skill Set

Noir, the third son of a destitute noble family, loses his job to a more influential noble, leaving him disheartened. With limited skills that prevent him from enrolling in the Hero Academy, he feels stuck. In his quest to enhance his unique ability, [Great Sage], he unexpectedly discovers a concealed dungeon that may hold the key to his improvement.