Apocripha/0 takes place in a "devil's point of view," in a world known as "Naraku." Since devils live here, in vice versa, angels from 'heaven' are their enemies. In this world, there was a powerful king of Hell who ruled under the absolute rule that "only the strongest will survive." He spent a long time trying to create a peaceful world, but his time was almost up, and therefore, his hopes lie in the fates of his twin princes - Alex and Platina.

The king ordered Alex and Platina to fight each other in the "battle/war of succession." They were raised and trained by their own staff officers - Sapphirus takes care of Alex, and Jade trains Platina. Aside from having the same blood flowing in them, the two princes are actually strangers to each other. Alex does not want to fight Platina, but Platina does not seem to hesitate. Does Platina really want to fight? Will they have the strength to fight each other? Only the strongest will survive... Who will win?