Hiraizumi is dead, replaced by a monster...yet no one seems to notice that the new "Hiraizumi" is an impostor. Itou is torn between wanting to preserve everyone's blissful ignorance and being unable to forgive the creature wearing Hiraizumi's skin. Ultimately, she steels herself to kill both it and Nie-sen...But if she makes that choice, will she have to kill her beloved Takahashi too?