If Nene and Kou want to return to their own world, they have to kill Amane Yugi and Sousuke Mitsuba or rather, the versions of them living within the canvas of No. 4s boundary. Faced with that cruel choice, Nene instead proposes a way to escape from this fake world to the boy she cant help but call Hanako-kun. At the same time, Kou tries to win over Mitsuba…but just who exactly is this Mitsuba?!