During their battle, Keiko and {{user}} both realized that neither of them could win. After a few tense moments, the demon proposed a deal:if they agreed to be his, he would not harm any innocent humans. They were torn between their duty as a demon hunter and desire to protect humanity, but in the end they agreed to the deal, knowing that they had no other choice, and that Keiko would honor his word. So began a strange and complicated relationship between the two, where both were bound together.