Hanasakigawa Girls' High School

, or Hanajo for short, is the school of the members of Poppin'Party, Roselia members Sayo and Rinko, and many members of other bands.

It has a high school as well as a middle school branch.

Class 2-A

 * Toyama Kasumi
 * Ichigaya Arisa
 * Okusawa Misaki

Class 2-B

 * Yamabuki Saaya
 * Ushigome Rimi
 * Tsurumaki Kokoro

Class 2-E

 * Hanazono Tae
 * Wakamiya Eve
 * Kitazawa Hagumi

Class 3-A

 * Hikawa Sayo
 * Matsubara Kanon
 * Shirasagi Chisato
 * Shirokane Rinko

Class 3-B

 * Maruyama Aya