Civil servant Yor Briar has a secret identity: an assassin named the Thorn Princess. Lately, single women had been suspected of being spies, which was making Yor nervous. Meanwhile, Loid was searching for someone to play Anya's mother so they could attend the interview at Eden College. He just happens to run into Yor at a boutique. Anya reads Yor's mind and finds out that she's an assassin and tries to get Loid to ask Yor to play her mother.

Anya ends up with a Tonitrus Bolt after she hit Damian Desmond. Sadly, this causes her to stand out for the wrong reasons in class which depresses her, but she ends up friends with Becky, and school becomes a little more fun. She also tries to apologize to Damian for hitting him, but just can't seem to get the words out. For the sake of Operation Strix, Loid disguises himself as someone who works at the school and tries to help Anya reconcile from the shadows, but...

Ostania's counterintelligence agency and national security bureau conducts spy hunts and keeps surveillance on its citizens to maintain peace within the country. They are also called the Secret Police and are feared. Yor's younger brother Yuri actually belongs to the Secret Police and is hunting down spies while keeping this a secret from Yor and others around him. One day, he suddenly shows up at the Forger residence. The Forgers, who are full of secrets, and Yuri, who has a secret identity, come face to face!

In order to prove to Yuri that they are actually a married couple, Loid and Yor are supposed to kiss. Loid is willing to get this done immediately for the sake of Operation Strix, but Yor can't do this sober, so she ends up downing a bunch of wine and gets drunk. Yuri sees his sister this way, also gets drunk, and is unable to make rational decisions anymore...

Anya meets a mysterious dog who can see into the future. They were able to escape from the terrorists with the dog's help, but eventually, they fall back into the hands of the terrorists again. And then Yor shows up and attacks the enemy! Soon after, the dog sees into the future again. The vision Anya saw through the dog's mind was Loid unconscious and buried under the remains of a building that had been bombed. In order to stop this future from happening, Anya and the dog head to the place where the incident happens!

Why has Yor been coming home late every night, her hands covered in cuts? Why has Franky asked Loid to meet him under mysterious and urgent circumstances? These are two tales of misadventure while seeking happiness in Berlint.

Anya and the rest of her class have an arts and crafts lesson where Anya is put in the same group as Damian. Sylvia goes about an ordinary work day. We learn the secret source of Yuri's strength.

Next week is Eden College's midterms. That week happens to include the new moon, the one day of the month Anya can't use her powers to cheat. But then, Yor suggests that Yuri should be her tutor...

The midterms are over. Loid is nervous about Anya's test scores and heads to Eden College to alter the answers. However, there already seems to be another guy there with the same motive that's making himself insanely suspicious and obvious?!

Yuri is doing great at his job with the Secret Police. His assignment today is to investigate a former newspaper reporter suspected of selling articles slandering Ostania to Westalis. Anya's favorite cartoon hero Bondman shows off his elegant spy moves!!

On a mission as Thorn Princess and using her job as city hall as a cover, Yor is tasked with protecting the only survivors of the Gretcher family, Olka and her son, and helping them escape to a different country by traveling on a cruise ship.

The deck is filled with passengers enjoying the fireworks show. Anya and Loid were also enjoying the fireworks. Meanwhile, Yor's mission finally reaches its climax. She tries to help Olka and the others escape, but they are surrounded by assassins!

The morning after the attack from the assassins and the bomb scare, the cruise ship arrives at the resort island. Loid and Anya meet up with Yor and the three enjoy a family vacation!