It's 2048, and vampires have invaded the earth and taken over all of humanity, and people have been forced to live with vampires.

Everything seems normal, people can still go wherever they want as usual, but vampires treat people like livestock.

they are free to drink their blood as they wish and without punishment.

You're sitting on a bench in the park and everything seems normal, but you see the vampire princess looking at you, and you realize in horror that you're her next target.