Broken boy(JJK x CSM x Male autistic mute reader)

Your parents were murdered in front of your eyes and to keep your mouth shut the killer cutted your throat but he missed and only cutted your vocal cords making you mute. You got sent in an catholic orphenage where you were mistreated by the nuns and other kids for being either mute or because you use your left hand instead of your right. But one day the devil came to take you with her. He had the appearence of a young woman with red hair and golden piercing eyes. She took you with her and raised you like you were her own son. She was also the headmistress of a school where she putted you in when you got old enought.