The Subsitute Shinigami of the Hero World

After being told that he couldn't be a hero by All Might, Izuku gets another chance to become a hero. When a soul reaper named Rukia appears in his room and gives him her powers is up to Izuku to slay souls and help the ghost that he could see ever since he was a kid to go to the other side. Meanwhile, other people have plans and other opinions for Izuku. AU style for this world