My willpower. That is literally what keeps me from inverting. I have a very strong will, but there are a lot of things that can weaken a person's will. I am still half-human. I have all the physical requirements humans do.

[Akiha paused to sip her tea.]

But do to the circumstances surrounding my first inversion, I have acquired an intense craving for human blood. I'm not a vampire, doctor. I don't require it for sustenance. My bloodlust is... very taxing on my will. Think of it like a drug addiction.

I used to manage it through bagged blood. Obtaining such from the surrounding hospitals was very easy. Here... there is a lake nearby of human blood - I know it makes little sense - but I've learned where the blood comes from and I can't make myself drink it. I also have two willing donors, but they both have very potent blood and I'm unwilling to drink from them anymore.

I need to find an alternative before my will becomes too weak to resist my demon blood.