It is the third installment of the Girls × Heroine Series produced by Takara Tomy and OLM, Inc. with the assistance of Shogakukan and EXPG Studio.

The series stars Minami Hishida, Kira Yamaguchi, Toa Harada, and Ran Ishii.

Additional cast members include Mandy Sekiguchi, Tsubasa Honda, and Takumi Saitoh, with narration provided by Toshiyuki Toyonaga.

The plot is centered on Phantomirage, a group of middle school gentleman thieves who fight the Gyakugyaku Police, and steal the treasures in people's hearts.

Phantomirage is a group of phantom thieves recruited by Phandy to recover the Secret Keys.

[1] Each girl uses a Phantomi Trick (ファントミトリック, Fantomitorikku), the key-like baton that extracts and purifies Reverse Jewels into a Secret Keys.

[10] Minami Hishida, Kira Yamaguchi, and Toa Harada were announced as winners in the actress category.

[5] Prior to debuting as an actress, Yamaguchi had been part of EXPG Studio's female U-14 trainee group, Kizzy.

[13] Yuki Miyoshi, Momoka Sumitani, Misaki Tsuruya, Youka Ogawa, and Kurea Masuda reprised their roles from Magical × Heroine Magimajo Pures!

Their first single, "Jan Ken Pon", served as the show's first ending theme song and was first performed at a baton touch event with Magical × Heroine Magimajo Pures!.

The group officially ended activities in June 2020, however, they made an appearance at Momoiro Uta Gassen on December 31, 2020, as part of the white team.