Continue to follow a story about a dungeon core named "The Eternal Training Ground" as it lives life as it wants to. ETG continues to create new floors, which attracts more and more adventurers who want to discover the secrets this dungeon holds, but more importantly, continue to grow stronger.It does not take long for local powers to take notice and want a piece of the profit the adventurers are bringing out of the dungeon. Ace, the person officially in charge of and the owner of ETG, must learn to govern and defend what is his or lose the dungeon town he built, his lands, and the contract with ETG.