Shido wakes up by the troubles of both Tohka and Yoshino and somehow resolves it, meanwhile Origami got suspended for two months by the AST. While eating their breakfast, Shido receives a text from Origami and they discuss about the event that happened a month ago, While cleaning the room of Shido, Tohka notice a suitcase (for their school-trip) that is a resemblance of a drama sequel on the television. Tohka got worried and rushes to find Shido with Origami

After a very awkward moment in Shido's class where Tohka tries switching genders in an effort to bunk with Shido, the class goes on a field trip to Arubi Island. During the entire trip, Origami and Tohka end up constantly annoying Shido in an effort to win his affections. Meanwhile DEM Industries, an organization with an interest in spirits begins stalking Tohka

The twin spirits, still trying to seduce Shido, start cuddling up to Shido completely naked in bed. The situation worsens when one of his teachers walks in on the mess. Later, Shido plans to seal the Yamai twins' powers without letting one of them win in an effort to avoid both the unpredictability of the loser and what would happen to the loser's personality

The woman stalking Tohka and Shido before, Ellen, finally reveals her true colors and orders a pack of mechs called Bandersnatch units after Tohka in an attempt to capture her. During the clash, Tohka gets incapacitated and captured only for Shido to call upon her sword to break the Bandersnatch off her. Meanwhile, Kannazuki and his crew on board the Fraxinus gets attacked by an enemy airship

The suspension placed on Origami is finally lifted, we see Kusakabe having some complaints and a new character is introduced into the series. Shido is selected as the organizer of the Ten-Oh Festival, after a spacequake alarm goes off, Shido gets working and a new spirit is revealed, Diva, proves to be more of a challenge than the other spirits. AST interrupts Diva and they go on trying to take her down resulting in her escaping, after Shido encounters himself in a troublesome situation

Mana finally awakens from her battle with Kurumi. For the upcoming competition Ai, Mai, and Mii prepare a band to compete against Miku's. Origami hears from Ryōko about the usurp mission in capturing Tohka and Shido during the festival

As the score results for the annual contest comes in, even though Miku won the best performance, the support of Raizen's Maid Café earns Shido enough declare winner. Depress and refusing to accept Shiori's friendship, Miku unleashes her angel Solo brainwashing the crowd, except Tohka, and hold down Shiori. But then Miku finds out Shiori is a guy leading her totally shock

Shido and Kurumi arrive back at the Tengu Square to reason with Miku. Obnoxious she attempts to assault Shido, but Kurumi's power intercepts as she's resistible to Miku. As Kurumi distracts Kaguya, Yuzuru, and Yoshino; Kurumi traps Miku with Shido in a dark void to have private conversation

Shido almost got caught until Miku makes an entry as she commands the Spirits to join the battlefield just to collect Tohka. Origami in a convention suit partners with Mana. While Shido and Miku argue, he reveals that Kurumi learned how Miku acquire her Spirit power from Phantom (like Kotori), she finally tells that she used to be a splendid singer Tsukino Yoimachi, but one day she rejected a TV producer's career offer due to disgrace, then bad rumors spread with no help from her agency and fans, she tried to reconnect with her fans, but suffers psychogenic aphonia, resulting in her losing her voice; this cause Miku to tension condemn humanity

Tohka is born into a negative form with her counterpart sword Qliphoth and has no memory. Mana and Jessica reach the concluded battle. Jessica, dying in Mana's arms, tells how she always felt jealous and wanted to become strong for the DEM, Mana made her decision to dishonor Westcott