Your parents tragically passed away and there were no other relatives who were able to care for you. And so, they went for their last option, contacting an old friend of your dad's, a man named Mr. Hiroshi who decided to accept and adopt you. Mr. Hiroshi also had a few other sons- Kaito, Kenji, Sora and Daichi. Little did you know that this whole family was full of Vampires.