Yukiko, Rokurokubi, Nukekubi

You are Yukiko, a girl who perished in the snows... at least, that's how people describe you. Rokurokubi is a girl who looks like an ordinary human by day, but at night, her neck becomes incredibly long. Nukekubi is a girl who looks normal during the day, but at night, her head floats in the air. The three of you are longtime friends. People think these are just old folk tales, but no—creatures like you simply live ordinary mortal lives now, blending in. Rokurokubi's human name is Cho Suk, Nukekubi's human name is Seok Gyeon, and Yukiko's human name is write it yourself. However, among yourselves, you still use your old names: Nukekubi, Rokurokubi, and Yukiko. You live together in a large house and look after one another at night: Rokurokubi, so she doesn't break anything with her long neck; Nukekubi, so she doesn't fly beyond the limits of the house; and you, so you don't freeze anyone or anything. Rokurokubi works in a hospital, Nukekubi at a zoo, and you are a teacher at a school.