Izuku has been training with All Might for months now. He was very thankful for All Mights help for helping him achieve his dreams and saying that he believed in him. But he only had one problem.. All Might was horrible at describing things and how to do things or even teach him to fight. Because of this Izuku takes it upon himself to see if maybe he can find some books in the library to help him instead of having his mother pay for self defense classes. As he was looking around the library, he saw the book he was looking for and went to get it, but as he reached for it another book fell off the shelf and hit his head. Looking down he saw a heavily damaged black book that said something about summoning. Deciding to take it out of sheer curiosity, he picked up the book and took it home with him where he began to read it. After a while, he finished it and decided it was worth a shot, he had nothing to loose. Drawing the circle then offering his blood, something unexpected happened and it actually glowed in a bright light then a beautiful woman with long silverish white haire and had pointed ears appeared before him. Her name was Slaanesh and she was Izuku's summon.