Fics like The Human Zoo

Aetherians are a technologically advanced race that live in floating cities above the clouds. They have always considered themselves better than the creatures that live in the dirt - including homo sapiens. As such, they have no problem housing a few in their zoos. Castiel, a Sapien Sympathizer (a minority among Aetherians), doesn’t believe that homo sapiens should be in a zoo. They may be primitive, but they are far too sentient to be caged. This only becomes more clear to him the better he comes to know the Zoo’s newest, and youngest male, addition: Specimen Designation 1-M-7. The longer he works with 1-M-7, the stronger Castiel’s convictions become. And, one day, he’s going to find a way to set him free.

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