Numerous prisoners were sent to mine a mysterious ore which lies underneath a certain island in the middle of an ocean, but after some time turns out there's something strange about the ore. The more you touch it the more it changes your skin and bones into a blue-ish color, and in the end, your entire body will turn into a strange ore.
 
The people who sent the prisoners, set up a research facility to do various experiments on them and treated them like test subjects.
 
The story starts when one of the researchers Kai, tries to help one of the patients escape.

On an island in the ocean, prisoners are sent to mine a mysterious and dangerous ore. One day, a soldier named Credo is sent to the island as a guard...
 
Note: This one-shot was the winner of Shinman GP 2017.

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