Concerned about Aoto's emotional disconnect, Akane and Midori look him up on the academy server, but his information were classified. Determined, the two steal Undine's access pass and finds out that Aoto is a suspect of the Blue Christmas massacre.

Lead by Arthur, the Knights of Round and the Adapters from the Academy head for the Divine Gate. Arthur explains that his wish is to destroy the Gate and return the world to its original state. However, Loki and Oz stand in their way to stop them.

With "despair" being the key to the Divine Gate, both Akane and Midori's loss of their significant person tragically gives them access to the Gate as well. However, Aoto is up for more despair as he faces his twin brother, Ariton.