[3] Set in a 20th century alternate reality of England, the series follows five young girls enrolled in Queen Mayfair's school serve as undercover spies, working for the Commonwealth to overthrow the Kingdom, which divided London into two.

Eventually, the two sides reached a stalemate, and a great wall was erected through the middle of London, splitting Albion into two nations: the Commonwealth and the Kingdom.

Several years later, the Commonwealth launches "Operation Changeling", a plan to replace the Kingdom's Princess Charlotte with Ange, a girl who bears a strong resemblance to her, in order to have a highly placed agent within the royal family.

So begins the story as five girls, including the Princess herself, serve as undercover spies in the Kingdom working for the Commonwealth, while enrolled as students at the prestigious Queen's Mayfair school.

[1] The series is directed by Masaki Tachibana, with scripts written by Ichirō Ōkouchi and character designs by Kouhaku Kuroboshi and Yukie Akiya.

The opening theme song is "The Other Side of the Wall" performed by Void_Chords featuring MARU, and the ending theme is "A Page of My Story" performed by Ange (Ayaka Imamura), Princess Charlotte (Akira Sekine), Dorothy (Yō Taichi), Beatrice (Akari Kageyama), and Chise Tōdō (Nozomi Furuki).

[19] A six-part anime film adaptation of the series titled Princess Principal: Crown Handler was announced on April 29, 2018.

[25] A manga adaptation by Ryou Akizuki began serialization in Tokuma Shoten's Monthly Comic Ryū website on November 8, 2019.

[28][29][30][31][32] Kotaku picked it as one of best summer 2017 anime series, with writer Cecilia D'Anastasio noting that the "soundtrack is jazzy madness.