2 My blood, My pain » by YoungbloodRay Kichirou Koshio is the brother of Karako Koshio hiding out in Gotham for the past five years, away from the prison known as the Deadman Wonderland. While in Gotham he has fought crime as the new Nightwing alongside the Blackbat aka Cassandra Cain. One day he gets a card from his sister asking for help he makes a choice to go to the prison to help her. better summery in story.