After ravaging demons destroyed the earth, they left a small island floating in a alternate dimension. In the middle of the island is a large hole with tentacles that grab anything that comes to close, meaning instant death, though there is a rumour that there is a house inside the "Tentmon."

A few humans survived and are now living on this "demon world". There have been spottings of 3 fallen angels, and many other creatures, not to mention hundreds of demons. Will the humans and angels survive the constant onslaught of anger from the demons? Or will they fall prey?