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A civil strife broke out in the Yunniao clan in the sky. The Yunniao King and his wife were killed. Their only son also fell to the earth during the war and was rescued by a couple. Because he had wings growing on his back, he was regarded as a monster by the world. His adoptive parents had to move the family to a hidden place. They thought they would live a peaceful life, but on the day he was nineteen, he was discovered by the sky and started to hunt him down...