Released

Izuku had gotten attacked by the sludge monster when he was seven, no one had come to save him. The sludge villain successfully taken over his body, but he was still alive. He was conscious, he watched the sludge villain pretend to be him for years. He watched as the sludge villain got into his former dream school, he watched at the sludge villain received All Might's quirk. Then the sludge villain left his body, leaving Izuku in control once again. But now Izuku is different, now he's the villain.