Help

I read this manga once a few years ago when it was still ongoing but it might be completed now. I don`t remember what the name is please tell me in the comments if any of you recognize it.

Its a lot like tomodachi game except that this boy has been bullied in school by his classmates and one of them is a girl. His name is emiya i think. She thought that he was weak but he is not. He asks his handler if they could get her for him. they kidnapp her and bring her to the game. Emiya ends up killing her. His handler then realizes that they might have created a monster. and the handler or whatever he is finds it interesting and wants to see what the boy will do next.