Can you imagine a touching reunion between two siblings? A reunion in the grandest way? Perhaps you will imagine a reunion under the moonlit sky... Well in a way it is true.       But the where and when you imagine is unrelated to this story anyway. The HOW it is what important.  So HOW does the reunion happen when the two siblings have their own share of problem?        What if each of the siblings rule over each of their respective organization? What if those organizations have the power to become a terror of the world it self? What if the brother have lost his memories due to the selfishness of jis own family? What if he bore hatred? What if his sister has a brother complex and she is a yandere?          Well... Can you imagine that?