Black Bullet, Vol. 6 (light novel): Purgatory Strider — Shiden Kanzaki

Rentaro is still a fugitive, running from the law for a murder he didn't commit. He and Hotaru are bruised, bleeding, and barely on speaking terms, but they're equally desperate to uncover the identity of Suibara's killer. However, Police Superintendent Hitsuma hasn't given up on pursuing Rentaro! With Hitsuma's impending marriage to heartbroken Kisara advancing closer and closer, will Rentaro clear his name and rescue her in time? And what does saving Kisara mean for their future?