Humanoid Monster Bem is a live-action adaptation from the original Humanoid Monster Bem anime. The TV Drama series premiered on Nippon TV's "Saturday Drama" block on October 22, 2011.
Bem, Bela and Belo are a trio of humanoid monsters who live side-by-side like a normal family. They have the appearance of humans, but when they get angry or sad they change into ugly monsters. Due to their sense of justice, they help humans but disregarded in fear for their true appearances. But the three humanoid monsters continue to fight evil for the past several centuries while hiding in the shadows, hoping one day to become humans as soon as possible.
One evening, Bem meets Detective Natsume by helping another man. Bem gets invited to eat with Detective Natsume's family where Bem happens to see a picture in the Natsume's family home. In the picture, there is an individual who may hold the clues of becoming a human. Bem, Bela and Belo meet the person in the picture, Professor Ogata, but claims he does not know anything about that, leaving the three disappointed. Soon, Professor Ogata disappears and Detective Natsume finds himself in the middle of a mysterious case.