Ep. 13: Natsume's death prompts Kazura to return to allies while Isao dies protecting Yukina from Sakurai.

Natsume dies from injuries sustained fighting Kuse, requesting his death remain hidden from Yukina. This event convinces Kazura to stop living in the past and reunite with his former allies. Sakurai Kikan confronts Isao, who argues that humanity must witness tragedy to prevent future wars, but Shizune counters that his actions were motivated by his deceased fiancée. When Sakurai attacks Yukina, Isao intercepts the bullet and dies. Sakurai, who infiltrated the group to manipulate nuclear arms, has his memories erased by assistant Ichishi. Shizune also asks Ichishi to erase her memories to spare others her fate. Aoi and Kazura attempt to hijack a plane carrying an atomic bomb to drop it into the ocean. Only Kazura is seen escaping the crash, leaving Aoi’s fate unknown. Two years later, Yukina visits Feng Lan, who shows her a group photo from Hokuryou including Kazura. Yukina hears a poorly played violin reminiscent of Aoi, but sees the Japanese Army marching, signaling that war is imminent.

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