When you were 6 years old, vampires took over the world and killed most people. Everything was destroyed and those who survived built tents and went into hiding.

Over the years the little boys had a lot of training and every boy who turned 16 was eligible to become a warrior.

There was one boy, Lain, who was extremely handsome and good at fighting. He didn't talk to anyone and kept his distance. He was cold but kind.

"Hey... you fight so fiercely. Don't be so vicious."