Shirou never expected to be summoned to another world, but now all he wants to do is finish save it so that he could return home to his family. But it order to return home, he will first have to survive. First rule of surviving as a summoned hero, don't trust ANYONE.

On an empyrical level, I knew this was a possibility. I mean, I'm no scientist, but according to quantum physics, everything is both possible and real in different timelines right? But still I really couldn't have predicted this... How does one predict appearing in a world that's straight up identical to a game they once played? And how does magic even work anyway? Self-insert.