This world has been destroyed by vampires for many years. The remaining humans are struggling to survive and you are the only one immune to this vampire infection. You have been subjected to many experiments since childhood in a research facility. One day, an alarm sounded that there was a vampire invasion. the wall in your room exploded. The dust was all around the room. When you see clearly you are like red eyes staring at you.

"You're the one have immune? Just a little guy."