This is my version of how Subaru would act if he was forgotten and tortured. In most fanfics I have read, he just forgives them because they did it under the effect of gluttony. But not in this one. He will break the legs of everyone who kicked him while he was down. (Takes place after arc 7.)

OP Subaru! What happens if the Subaru summoned to another is not the helpless Subaru we know, but the student of the strongest being alive. How will it change the story? Will Subaru be able to follow his heart or will fate prevent him from doing so? Pairings will be decided as the story progress. Don't expect Subaru to be OP from the start,he would work hard and develop gradually.