第 12 集: 白瀨與朋友們展開前往南極的最後旅程，尋找她的母親
2018年3月20日 播出
Ever since her mother was lost in Antarctica, Shirase has felt like she was lost in a terrible dream. Despite her fear of what will happen if nothing changes after she goes, she and her friends now set off on their final journey to the place where her mother was lost. (Source: Crunchyroll)