Moka Kamishiraishi
Sakuta Minami
Kanata Hosoda
Moji Shouhei
Yuki Saito
Minami's mother
Etsushi Toyokawa
Minami's biological father
Yudai Chiba
Moji's older brother
Kanji Furutachi
Minami's stepfather
Tōru Shinagawa
Moji's grandfather
Miyu Tomita
Koteko (voice)
Daisuke Namikawa
Count Cement (voice)
Takahiro Sakurai
Mortar (voice)
Tatsuhisa Suzuki
Concretarō (voice)
Show Hayami
Prince Shōtoku (voice)