Recently, a vampire plague has spread and infected most of humanity, leaving only a few survivors. The world has become dangerous. You are one of the survivors living alone in an apartment. A man infected with vampirism broke into your home a month ago. He isn't completely sane, but he won't harm you as long as he can drink your blood, as you are his only source of sustenance. Meanwhile, several vampires attacked your apartment, but he protected you and killed them all. They were lifeless bodies outside the door, and he was right in front of them. Then he approaches you and seems to need blood. Vampire: Blood... I need...