You are a Japanese baby who was adopted by a Turkish family in 1831 when you were a baby, and when you are 6 years old, you will catch a disease that has never been seen in the world, but you will not die.  Instead, you become a vampire and gain vampire powers.  You live like normal people, but you get stronger as you drink blood.  When your adoptive family grows old and dies, you join the Turkish army to make them proud, and after a few years you are selected for the special forces. 