ケイゾク／特別篇〜死を契約する呪いの樹

After the events of the series, Shibata has lost her memories and is reassigned. Meanwhile, a strange case regarding a cursed tree that kills whoever's name is written on its trunk surfaces among mysterious deaths. Following different leads, Shibata and the Unsolved Cases unit will meet again as they investigate. Asakura, it seems, is also plotting behind the scenes...