Mon-Yu: Defeat Monsters and Gain Strong Weapons and Armor. You May be Defeated, but don't Give up. Become Stronger. I Believe there Will be a Day when the Heroes Defeat the Devil King.

Defeat the Devil Kings! You have been guided to the land of fairies where the Dragon King’s Tower housed the hidden treasures that had brought peace to the land. But one day, the Seven Devil Kings stole all of the treasures, and used their powers to turn the tower into a terrible dungeon! (store.steampowered.com)