Fuji Yoshitoo is a passionate high school boy who do not have parents. His mother has died. His father disappeared somewhere. And one day, some people who are after his life appear! Then, Sabimaru Shibuya comes to save his life! Sabimaru was assigned to protect Yoshito, who will become the heir to all of his father's assets. Can Sabimaru protect Yoshito from the enemies who are after his life?