Hideo Osumi

Inspired by a bizarre murder case, this is the story of a family and the voice "POCA PON" — a voice that sometimes heals people, and sometimes destroys them.

Haruhiko Nakayama is vice principal at a Japanese school, where he takes care of everything and dreams of finally becoming principal. But after a teacher no longer turns up for lessons, Nakayama has to teach a primary school class again after more than 20 years. He encounters such great challenges that he soon begins to doubt his profession.

Three former middle school friends who reunited after 37 years to pursue the mystery behind their former club advisor's disappearance.