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White-collar Yan Feng suffers from advanced bone cancer, but unexpectedly mutates, gaining super senses and self-healing abilities. Before he could rejoice, he discovered that he would do some weird things; such as eating raw meat, peeing to mark territory, having the urge to ride astride, and having terrible mania, etc.; The most deadly thing was that he would lose control every once in a while and turn into a humanoid monster full of killing and eating desires...