It's the naming!?

Romi Park

Higepiyo (voice)

Yu Kobayashi

Hiroshi (voice)

Eiji Miyashita

Papa (voice)

Satomi Arai

Mama (voice)

Motoko Kumai

Kumano (voice)

Tomokazu Sugita

Kato (voice)

Airi Sakuno

Emi-chan (voice)

Chiwa Saito

Haru-sensei (voice)