Tập 4: Các cơ quan chức năng đang truy tìm Kaika Itsuki giữa bối cảnh gián đoạn đường sắt và căng thẳng bầu cử.

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The rail system is shut down after numerous suicides and the authorities assign Morinaga to coordinate the search for Kaika Itsuki. The Kasumigaseki Vice Minister of Justice, Yoshifumi Sekuro, explains that Itsuki may not have actually broken the law. Later, Assistant Officer Hiasa Sekuro is assigned to Seizaki’s team, who is also the niece of Yoshifumi Sekuro. Itsuki releases another video announcing a new suicide law, which will become the focus of the upcoming election, virtually splitting the candidates into pro or anti Itsuki factions. Kasumigaseki Police Director of Unit 1, Torao, also joins the investigation team. Days before the election, Seizaki's team have still not located Itsuki or Ai Magase, nor can they find evidence that Itsuki abetted the suicides. However, Seizaki eventually obtains some data on Ai Magase. (Source: Wikipedia)