As the class is asked to research the meaning behind their names, Yayoi laments that she does not remember much about her late father who named her. As she ponders about why she was given her name, she has flashes of a certain place but cannot seem to remember where. As she remains uneasy, she sees her mother, Chiharu, who shows her some origami Yayoi had made for Father's Day, which he kept as important treasure...