Kyle, an emotional corrector, accidentally came into contact with a blocked memory (No. 7423) Full of primitive emotions during a job, causing his emotional system to "malfunction". In order to protect himself and find out the truth, he was forced to flee to the abandoned capital and met Lina. While avoiding Sig's pursuit, the two gradually uncovered the huge conspiracy behind the "center"'s deprivation of human emotions, and finally embarked on the thorny road of awakening the emotions of all mankind.