Ye Nan, a pet shop owner, awakened the ability to symbiosis with mechanical beasts in the mechanical apocalypse. When he equipped lame stray cats with rail gun claws and blind mechanical dogs with thermal tracking eyes, those mechanical beasts abandoned by humans began to purr and recharge in his palms. The pure-blood faction calls him a monster, and the symbiotic faction calls him the savior. Only Ye Nan knows that every time Tiedan rubs the barrel of a cannon against his palm to dry a small fish, the mechanical core beats hotter than the human heart.