The Gatekeeper

So I need help with finding a book, if you guys would be so kind.  
          It is a story in which izuku is adopted by a pro hero (can't remember which) and is told fuck is a bad word.  Izuku shortly after meets endeavor and calls him fuck, so if anyone knows the book, I would be very grateful.

To those wondering th e difference between lemon books and lemon warning, 
          Lemon books=lemons with story
          Lemon warning=story with lemons
          If you find one in either category that you feel is misplaced, let me know, and if I agree, I will swap it

I am reading a book book on kindle, with great ways around copyright such as paybud and spaceY

I have an idea for a book to write, but 8pi am not the best writer, and i want your opinions

No.