Zero tried to sink his fangs into Yuki, but he was able to get hold of himself just before he succumbed to his urge. However, there is someone who is trying to kill him: the new teacher Yagari. Yuki finds out that Yagari is actually a Vampire Hunter and Zero's master. The Headmaster intervenes, and Yuki is taken away from the wounded Zero. The following day, Yuki becomes suspicious when Zero does not come to class. She learns from Yagari where Zero is being restrained. Concerned about Zero, whose body is rejecting the Blood Tablets, Yuki makes an unexpected decision!