On Anna Akechi’s 14th birthday, she puts on a pendant and meets a fairy named Pochitan.

Mikuru takes Anna to the CUREtto Detective Agency.

As black petals flutter and anxiety spreads throughout town, Uta proposes holding a concert and inviting a "special guest."

The CUREtto Detective Agency gets its first client.

Anna goes to Makoto Mirai Academy, Mikuru’s school, to give Mikuru an umbrella, but then she meets a troubled woman named Mariko who is looking for her little sister Keiko. Meanwhile, Mikuru is asked by the school’s Chairwoman to solve a case involving a ghost in the high school.

Mikuru leaves the care of exhausted Pochitan to Anna and Jett-senpai.

Anna transfers to Mikuru's class at Makoto Mirai Academy. While surprised at the size of the campus, she and Mikuru find themselves lost in a puzzle maze created by Goemon.

Anna and Mikuru convince Jett-senpai to make merchandise from his Pre-Kit inventions and open a store.

A very popular actress, Shiruku Ieiri, comes to Makoto Mirai Academy to film a TV program which has her joining in on a play as a member of the drama club. But right before the performance a very special costume goes missing from the club office.

A client comes to the CUREtto Detective Agency, asking them to help solve a mystery.

A calling card from the Phantom Thieves’ Guild is sent to the Hosho Art Museum. Anna and Mikuru arrive on the scene, there Luluka strikes a conversation with Anna while in the Starlight Princess display room.

Anna and Mikuru set out on a fact-finding mission to learn more about Cure Arcana Shadow.

Anna and the gang chase after Nijee, who has stolen a toy robot. As they face off against the Hanninda, Luluka comes with a message: Maestro Usonoir is on the move.

Anna and Mikuru are on their way to school when Rei, the Student Council President...

In the letter that arrived from London, Anna and the others learn that Cure Arcana Shadow is a genius detective named Luluka Moria. They go to a lake in search of more clues, where they encounter Luluka herself.

Novelist Eliza comes to the CUREtto Detective Agency to ask to work as a detective to get ideas for her next novel. Not long after that, the girls get a request to search for a missing cat.

Anna sees the mother of a client and thinks about her own mother.

The crossover continues on Detective Conan E1203 The Hanamaru Answer (II).