Fics like Improbable Fiction

There's a prophecy. Anevka doesn't want to go to a tower. Tarvek wants some peace to study and repair Tinka. Somehow, they decide disguising themselves as each other is the correct solution to their problems. Nothing could go wrong, right? Only, Gilgamesh Wulfenbach knows for certain that that is not Tarvek Sturmvoraus, and he's going to prove it. (Agatha is really just here for the death rays and muses, to be honest.)

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