The Falsely Exiled Strongest Cursebreaker, The Journey to Revive the Ancient Illusory Kingdom. The Cursebreaker King and the Princess of the Abyss

Alf, one of the kingdom's official cursebreakers, is sentenced and punished to be thrown into the abyss for crimes he did not commit. Before his very eyes lies a never-ending labyrinth... In this dungeon, that no one has ever escaped from, Alf meets a mysterious beauty!? The curtains open to the grandiose revenge story of a man who lost everything after being betrayed by his own ally!!

(Source: Shueisha, translated)