Moka Kamishiraishi

Character: Sakuta Minami

Kanata Hosoda

Character: Moji Shouhei

Yuki Saito

Character: Minami's Mother

Etsushi Toyokawa

Character: Minami's Biological Father

Yudai Chiba

Character: Moji's Older Brother

Kanji Furutachi

Character: Minami's Stepfather

Tōru Shinagawa

Character: Moji's Grandfather

Hina Yukawa

Character: Miyaji

Miyu Tomita

Character: Koteko (voice)

Daisuke Namikawa

Character: Count Cement (voice)

Takahiro Sakurai

Character: Mortar (voice)

Tatsuhisa Suzuki

Character: Concretarō (voice)

Show Hayami

Character: Prince Shōtoku (voice)