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 3-A

 * Toyama Kasumi
 * Ichigaya Arisa
 * Okusawa Misaki

Class 3-B

 * Ushigome Rimi
 * Yamabuki Saaya
 * Tsurumaki Kokoro

Class 3-E

 * Hanazono Tae
 * Wakamiya Eve
 * Kitazawa Hagumi

Alumnae

 * Nijikki Hinako
 * Toyama Asuka
 * Ushigome Yuri
 * Uzawa Rii
 * Wanibe Nanana
 * Hikawa Sayo
 * Matsubara Kanon
 * Shirasagi Chisato
 * Shirokane Rinko
 * Maruyama Aya