Courier Takuya rescues Yuki, the only remaining citizen of a city renamed Lost after its population vanished without a trace.

The pair's road trip hits a snag when a mysterious boy injures Takuya; Suzuna and the Agency attempt to stop Yuki and the others from getting away and Tama-shi enters into the mix.

When Takuya, Yuki and Geek become trapped in a strange spatial dimension, Geek sees the SPR5 members.

Yuki is beside herself after she hurts Takuya badly enough that he needs medical attention; New figures emerge on both sides of the conspiracy.

A magician named Yoshiaki asks Takuya to help him deal with the leader of the phantom thief brigade; Yoshiaki and Yuki pursue family.

Yuki tries to stop her brother by bringing him back to his senses, but he counterattacks with Tsubasa.