More than twenty years ago, an evil summoner called forth the "Great Summon," resulting in the deaths of a third of the human race, and devils and monsters invading the earth.

Years later, a painter named Tamura Fukutaro moves into "Ashiaraiyashiki," an apartment complex filled supernatural residents. As Tamura gets involved in the troubles of his non-human neighbors, a war begins among gods, devils, and the mysterious ruler known as "The Central."