Louise tries to prevent Saito from looking at other girls, but her plan fails. The newly crowned Queen Henrietta assigns the code name 'Zero' to Louise for a mission. When they get home Louise insists she tell him about the misunderstanding that Agnes said

The supposedly dead Wales appears and takes Henrietta to Albion. He uses his vow from their earlier days to convince her into following him. Saito and Louise goes to rescue Henrietta

Julio Cesare transfers to Louise's school and shows an interest in her. He challenges Saito to a fight in which the winner gets to kiss Louise. Saito receives special training from Agnès but Louise shows up and attacks Saito in a jealous rage yet again

Eléonore drags Louise, Saito, and Siesta back to the Vallière house, where Louise is announced to be engaged to a duke. Saito goes to talk to her at night but instead finds her sister who beats him like Louise does. Saito confesses his true feelings to Louise, makes out with her in a childhood boat, fights his way out of the Vallière residence, and heads back to school with Louise

Louise's sisters move in and make Saito do the work. Siesta makes a pass at Saito when Louise shows up. Just when Louise was about to strike him with a newer whip an explosion happens

Saito and Louise are ordered to be at Scarron's inn to receive further instructions. They take their previous positions and costumes back, and are surprised by Gulio's appearance. Saito runs into Henrietta who asks him to protect her as she poses as a commoner in order to lure out one of her enemies

Henrietta is convinced to sign a declaration of war against Albion. News of a victorious battle for the Tristain and Germania allied forces reaches a town that Louise and Saito are currently in. Saito discovers a sailor uniform on sale at a clothes merchants shop, and buys it, opting to give it to Siesta rather than to Louise

Albion sends hired mercenaries to make a surprise attack on the Magic Academy and take all of the people from the royal families hostage. Saito and his friends plan on how they will rescue the people taken hostage as it will take too long for the reinforcements to come from the palace. It is discovered the captain was one of those who attacked Agnes's town D'Angleterre's and burnt it to the ground 20 years ago

Colbert sensei and Saito devise a plan to enter into the building and save the hostages. Benubiro explains to Anies how his captain Snake of the Flame ruthlessly burnt the women and children to ashes. The team use their combined magic to enter the building

Henrietta has a special mission lined up and Louise and Saito are the perfect candidates. But Saito hesitates to go into battle because of what Mr. Colbert mentioned before

Henrietta's forces enter South Gotha and claim it. Scarron's traveling tavern sets up shop, and Saito and Louise are reunited with Siesta, Jessica, and Guiche. Guiche shows off a medal and relates a story of coming back from the dead, which no one believes

Are Louise and Saito being sent on a suicide mission? Before they even consider their safety, the couple has one last thing to accomplish and Louise wants to make a covenant