At Mahoroba Orphanage, Ryuuzaki Ikuo and Tatsuya Danno find solace in their caring teacher, Yuiko, until her tragic murder shatters their world. Despite witnessing the crime, they are silenced by the police, pushing them to uncover the hidden truths themselves. Years later, Ryuzaki joins the police force while secretly collaborating with Tatsuya, now tied to the yakuza. Driven by a quest for justice and retribution, the duo embarks on a perilous journey to unveil the malevolent forces behind Yuiko's death and restore their shattered peace.