[Fate/stay Night][shi Yan] Walk with Your Back

A scholarly story based on the premise of Kotomine Shirou Note that it is not Shirou Kotomine in Apocrypha (it seems that the spoilers now say that it is not Shirou Kotomine but Shirou Amakusa) but the author's delusion Shirou Emiya and Shirou Kotomine exist at the same time (there may be explanations in the text) There are some OOC characters, there are bugs in the plot settings, and the author's writing style is scummy, please be tolerant. If the above is acceptable The story of a boy who was adopted by Kotomine Kirei and named "Kotomine Shirou" after surviving the fire after the Fourth World War. Changes have been made based on the plot of the original Fate route.