Acting as a decoy, Arashi left Tobioka. Now, Black Label is looking for him, and their pursuit takes them to the United States and the city of Detroit. There, the team encounters a girl named Charlotte, who was rescued from an assault on a genetics lab by a mysterious hero... Shouji Sato, artist of "Highschool of the Dead" and creator of "Triage X," has also released a great number of adult erotic titles as part of the doujinshi circles DIGITAL ACCEL WORKS and GEBOKUDOU.