The two friends made a pact in middle school to kill their fathers, but in the end, Yuuya couldn't murder his parent because he discovered his resentment was ill-founded. Renji, on the other hand, had no troubles stabbing his father to death, and Yuuya was too late to stop him. When police arrived and Renji realized that Yuuya hadn't upheld his end, he felt entirely betrayed. Imprisoned in the Kanto Area Juvenile Corrections and Treatment Facility, Renji held fast to his hatred for Yuuya Daigo... and then Munetaka Yagyuu offered him a chance at revenge.
