Kamen Rider Blade X Boku No Hero Academia: The Undead Spirit

Izuku Yagi led a horrible life as his parents ignored him and his sister along with her friends and abused him. One day they took it too far and Izumi told Izuku to kill himself. As Izuku began to cry as he ran from there as Izumi felt horrible as they went after them as Shoto called his dad and told him what happened. Izuku's death activated the Monolith, releasing all the Undead that had been sealed away in the past. And now, saved by Joker Undead, Izuku Yagi or now Tachibana Hajime needs to seal all the Undead to atone for the mistake he made in his previous life. However, Izuku will not simply be a hero. And now, he is the Japanese government's Judicial Enforcer: Ace