12화: 시라세와 친구들이 어머니를 찾기 위해 남극으로 떠나는 마지막 여정
2018년 3월 20일 방영
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)