Omi was born Takatori Mamoru, the youngest son of the infamous Takatori crime family. Were it not for a twist of fate, Omi could very well have ended up a member of the organization that is attempting to kill him now.
A group of kidnappers abducted Omi when he was approximately seven years old. Rather than pay the ransom, his father left Omi in the hands of the kidnappers. Omi escaped before they could kill him, and was rescued by a man known only as Persia. The event proved to be too traumatic for Omi's young mind, and he repressed the entire incident.
Now, at the age of seventeen, Omi's memories are finally beginning to resurface. His newfound knowledge of his past may prove to be a danger to him, however, as the Takatoris express an interest in their long lost son. And what of his own teammate, Aya, who has sworn to kill every member of the Takatori family in his desire for revenge?