A man who has lost his memory. Test subject Type. 0 that was born as a part of the human enhancement experiment of the empire. As the first type of the Project Evil Knights that were only made to kill, Chase was brought through a secretive contract with the empire to assassinate the sole successor to its throne, Scarlet. However, he went berserk for unknown reasons during a fight against Clause and Demia who were guarding Scarlet, and he abandoned his mission and left. He failed to kill Scarlet and disappeared, so the nobles who had commissioned the assassination found themselves in trouble.