In this world, there are witches as well as a science of 'witchcraft'. However, the art of 'magic' is still unknown... After Treize summons the group, he decides to summon the mercenary in order to have a conversation with him in private. Following this, the mercenary is determined to separate from Zero, which is not to the taste of the latter who attributes this decision to the perfidy of the sorcerer. However, shortly after his departure, the Bestial already finds himself chased by a wandering witch...