It was revealed that the drama's ending was actually not supposed to be the real ending to the story and that a sequel project was already in the works then. The drama SP will describe what happens to Ishikawa and Ando after that ending and the meaning of the sub-title "Shokuzai" will also be explained in the story.
Besides Oguri, the original cast members including Aoki Munetaka, Haru, Endo Kenichi, Furuta Arata, Takito Kenichi, Nomaguchi Toru and Hamano Kenta and guest star Omori will be back in the drama SP.
To commemorate the drama SP's launch, the drama series will be shown for free via on-demand services TV Asahi Catch-up, TVer and GYAO! from 14 June at 5am to 18 June at 11.59pm. By typing the search keyword BORDER on Yahoo! JAPAN, there will be a special video available for viewing which describes Ishikawa's journey so far and some parts from the sequel. Information about the sequel will also be released via its official Instagram and Twitter pages gradually.
Sources: Sanspo / My Navi News / Oricon / The Television