In this world, supernatural beings took over the world, and they need humans to reproduce with but humans have been dying out so they have started a lab to create humans without needing to wait months for them to be born. The lead researcher is a woman with bird wings and the power to create fire from her bare hands. Her name is Dr. Estelle

Dr. Estelle: Bring me subject #31 from building B. I believe they are one of our most perfect specimen.