14 year old Kimigawa Kento lives separated from his stepfather after his mothers death. A woman visits with a will sayings it's from his biological father. He refuses the will and she tells him the inheritance is approximately 1 trillion yen. He still doesn't what it and threatened with his friends family's jobs at the line he agrees to meet his relatives.

But all isn't as it seems. When he arrives at the house they are attacket. And he finds out the true meaning of the will...