Secret (Dad for two) (Shigadeku siblings)

Deku is an assassin in this AU. Deku likes to kill, but he doesn't do that often, he mostly kills people with a reason. Not to mention, he also hates his boss.
And no, he's not a traitor in UA. Aizawa and Nezu knows that Deku is an assasin, as well being the son of AFO and the little brother of Shigaraki Tomura. But,
Shigaraki doesn't know that Izuku is his litte brother. They treat each other just like how they were in the anime.

I hope this one ends well unlike my first book XD I'm actually really young so don't expect much from me. The only reason I made this book is because these type of ideas keep coming to my mind. AND MIGHT HAVE SOME SLOW UPDATES, SO BE PATIENT!