The World where Dungeons exist, an existence that has been a thing of mystery to the populace. Sudden appearances can cause disturbance among the populace. If a Dungeon has grown strong enough, it is capable of birthing even Demon Lords, Immortals, Dragons, Devils, etc. The Populace has experienced such things in the past, resulting in dungeons becoming a mark to be destroyed before growing too powerful. Now a new dungeon is born, housing a lost soul from Modern Earth. How will this new sentient dungeon survive in this world?