Is It Wrong to Try to Pick Up Girls in a Dungeon?, Vol. 6 (manga) — Fujino Omori

Bell finally reaches the 11th level of the Dungeon to face his fated opponent--the monster responsible for his humiliation, the Minotaur. The memories of his flight and his failure assault him even as he confronts the deadly beast. Will the heroic drive that Aiz Wallenstein inspired within him be enough to defeat the Minotaur? Maybe, maybe not, but either way he's going to need some help from a new friend...