manganiME's manga / #killers(6)

Three juveniles raped and murdered his sister. Years later, they are free and he wants to meet them, to ask them questions, to see if they feel remorse. But things go bad and he ends up in the hospital...with a new ability. He can enter dreams. And he can't just enter dreams, he can do things in those dreams. Now, finally, he can avenge the vicious killing of his sister...