Rikka, Chiyo, Sekine and Tsubasa seem like regular middle-school girls, but they all have their own secrets.
Chiemi Tanaka
Rikka (voice)
Natsumi Murakami
Chiyo (voice)
Ayane Sakura
Sekine (voice)
Megumi Han
Tsubasa (Tsuyoshi) (voice)
Yu Serizawa
Tsubasa (Older Sister) (voice)
Yuya Hirose
Hanzо̄ (voice)
Yoji Ueda
Brian-sensei (voice)
Tomoko Kaneda
Maskuma (voice)
Hochu Otsuka
Narration (voice)
Daisuke Ono
Head of the Research Institute (voice)
