As Yotsugi's words sink in, Koyomi remains unfazed. He reasons that his experiences as a vampire must have come with a price. One that he should have to pay. Yozuru commends Koyomi for his acceptance, but tells him that while there is no way to undo the progress of his transformation, there is a way he can stop it from progressing further: he must no longer use his powers as a vampire. Yotsugi informs Koyomi that he can still use his blood to feed Shinobu, but he shouldn't do it too often, and not to the point where he gains any powers. Yozuru warns him that if he were to progress further toward being a vampire, she would have to kill him, as is her duty as a specialist. This raises Shinobu's ire, and she tells Yozuru that if Koyomi were to die, the restraints on her would be released, returning her to her status as lord of the vampires. She would use that power to kill Yozuru. Yozuru accepts the challenge. Yotsugi, not wanting to see the others fight, urges Koyomi to never use his pow