Twilight is an agent that works for WISE, Westalis's intelligence agency, and he is tasked with investigating Desmond, who is in Ostania and planning to start a war. Twilight disguises himself as the psychiatrist Loid Forger and adopts a girl named Anya so that he can enroll her into the prestigious Eden College to get closer to his target. Unbeknownst to him, Anya is actually a telepath who can read people's minds. One day, members of a mafia group that is after Twilight kidnaps Anya. Loid realizes that he needs to reconsider his priorities and...

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.

Yor moves in with Loid and Anya. Now that they are a family, they need to prepare for the interview. But Loid realizes with how Anya and Yor currently are, the interview probably won't go well. In order to make sure they all understand how an upper-class family should be, Loid decides that they should all go out as a family. They go to the theatre and a museum, but it's just not clicking with Anya and Yor. Twilight begins to lose hope, but...

The day they had been preparing for has finally arrived! The Forgers are fully prepared and head to the interview. As soon as they enter the school grounds, Loid feels someone watching them. All of the applicants were being observed from the shadows by the instructors of the academy. The exam had already begun. Housemaster Henderson, who would be grading their performance, kept a keen eye on how the Forgers were acting and seeing if they were truly worthy of the prestigious Eden College.

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 for parents to attend one of the social gatherings at Eden College, their children need to be Imperial Scholars, but Anya hating to study makes this rather difficult. Loid then comes up with a plan to get Anya to get Stella Stars by doing community service rather than with her academics. But when she ends up volunteering at a hospital, she continuously messes up. Later, she hears a child drowning in a pool with her telepathy and...

Loid is burdened with one mission after another from WISE and comes home exhausted. He then hears neighbors gossiping that he's neglecting his family. Because he can't let anyone doubt them as a family for the sake of Operation Strix, he decides to take his family to the aquarium the next day they have off to show everyone that they get along. However, he is assigned another mission from WISE while he's there, and...

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.

A social gathering happens at Eden College once every half term. It is a strictly guarded event where only Imperial Scholars and their parents, the VIPs of Ostania, are allowed to go. Damian tells his brother that he'd like to see their father when he attends the event. Loid finds out about that and uses Damian to get close to his target.

Due to the movements the State Security Service members were making, Loid finds out that there was a bomb on the ship. Loid leaves Anya at the daycare in a hurry then disguises himself as a State Security Service member to take care of the bomb.