This story is a sequel to A Certain Magical Friendship – Context_SHIFT
Nightmare Moon had been defeated.
Everypony had returned home from the world of 'A Certain Magical Index'.
But the portal is still open.
And when a certain world begins to probe a friendly world, both will have to come together to answer the question: are clones people?
This story can also be found on Spacebattles, Fanfiction.net and Archive of Our Own.