Naruto: Emiya Giant Hero

Shirou sat up and looked out the window. "I didn't expect that I would be an orphan in this world. I don't know how Miyu is doing now... That night, I was going to die in Shenji's hands, but on the edge of reincarnation, a voice sounded..." "I can give you power, but only if you first save another human world that is on the verge of destruction. "What a joke! Kiritsugu, Miyu, Sakura, I can't save any of them. Even I have to die here. How can I possibly save the world?" "You will go to another world as Shirou Emiya, and in the same way, you will gradually awaken all the powers that belong to "Shirou Emiya". "Who are you and what is the purpose of doing this? Why is it me?" "I am not anyone. I have only one purpose, which is to ensure the existence of the concept of "humanity" in all time and space. And you are the guardian who signed a contract with me. This is also your mission. "Then I saved another world, can I come back and save Miyu?" "You will come back with all the power you have gained. As for whether you can do other things, you need to find the answer yourself.