Official website: https://www.netflix.com/title/81318403
Rei Sakuma
My Melody (voice)
Junko Takeuchi
Kuromi (voice) / My Sweet Piano (voice)
Megumi Han
Flat (voice)
Kenji Nojima
Pistachio (voice)
Gakuto Kajiwara
Tanba (voice) / Sasage (voice)
Noboru Maeda
Baku (voice)