Joining forces with Alice, Iska and his team quash the Empire and the Sovereignty's conspiracy and successfully protect Sisbell. After the ordeal, they travel to Alsamira to enjoy their vacation. However, Sisbell has not returned to the palace yet, and asks Unit N07 on vacation to escort her back, offering something they can’t refuse. Meanwhile, Alice gets a gut feeling that Sisbell's new bodyguard might be Iska...

Iska and Alice suddenly meet again at the Riesbaden station. Alice then learns that he is the bodyguard for her sister Sisbell. Meanwhile, a major incident occurs in the central province.

The suspect who attempted the assassination may target Sisbell next, since she hosts an astral spirit with the ability to reenact the past and identify the suspect. Unit N07 goes on high alert and is left with no other option but to hide at a hotel and wait for an audience with Mirabella. However, a large explosion occurs near the hotel. When Sisbell tries to reenact what really happened, someone with the same "shadow" from the reenactment starts to attack her.

Alice is back in the central province and reports to her mother about Sisbell's whereabouts. Sisbell herself also returns to the central province a short time later. However, upon her arrival, there is a surprising encounter.

Invited by Elletear, Iska and his team visit the Erz palace, a vacation house owned by the House of Lou. Wary of her sister, Sisbell brings Iska along to sweep the palace for bugs. Iska is very nervous when she decides to sweep Alice’s bedroom as well. Meanwhile, Alice hurries her way to the Erz palace to stop Sisbell from discovering her forbidden secret. When the three princesses come together, Iska may find himself between a rock and a hard place...!

With news of the attack, Alice returns to the Queen's palace. Later they are attacked by an unknown enemy.

Iska must fight Talisman, who can manipulate invisible waves. Dubbed as “the Vicious Tyrant,” Talisman’s powerful attack is difficult to overcome, even with Iska’s mobility. Jhin and the others take Sisbell with them but are also finding it difficult to shake the Midnight Sun Witch, Grugell, who’s on their tail. Meanwhile, a fierce battle between the Saint Disciples and purebreds is about to start.

Although it appeared as if Kissing was defeated by Mei, she stands up again. Lord Mask and Risya, Growley and Nameless are also fighting one another, equally matched. As the back-and-forth battle continues at each location, Talisman reports that he has achieved his goal and is about to leave. Iska wants nothing more than to settle their fight, but an atrocious astral power approaches...

Alice’s hatred towards the Empire grows stronger after their recent attack, when Iska, in pursuit of Vichyssoise, appears in front of her. They can no longer maintain their easy relationship as a friendly rival. With ruthless determination, Alice declares war on Iska, regarding him as an Imperial swordsman, hostile towards the Sovereignty. Meanwhile, a man watches their battle and sighs... Salinger the sorcerer had also followed a similar fate as the two.

Everything is going according to plan for the House of Hydra, and the assassins are on the lookout in the city. Iska and his team are brought to the safe house by the servants of the House of Lou, and they promise to rescue Sisbell. Meanwhile, Mirabella finally awakens while Alice was pressed with the enormous aftermath of the events as the acting queen. Alice reveals to Mirabella that there is another mastermind besides the House of Hydra.

Iska begins with the plan to infiltrate Hydra's base to rescue Sisbell.

Iska sends Miska and the others away to safety and faces Mizerhyby himself. Soldiers with their attack power significantly enhanced by Mizerhyby’s astral power, “Glory,” targets Iska. At the same time, Salinger also shows up in “Snow the Sun.” Vichyssoise attempts to intercept him, but... Will Iska and the unit succeed in rescuing Sisbell in the midst of all the chaos?