One day, with a strong force "brave " into the castle, he in order to save the human world to the fiendish challenge. However, waiting for him is a very similar appearance and the human female " the devil ". The LORD did not choose and brave fight, but hope to be made under the contract of her possessions. While facing a decline and duel of the brave, Prince of the devils began calmly to the analysis of the human and demon between the actual situation, analyses the current social order is depend on the war of this fact, of even in defeat devil can fundamentally solve the war the source of the truth.