BEM originated from a 26 episode Japanese anime series which first aired in 1968. The current series is the third anime television series adaptation which started to premiere on July 14, 2019.
The plot of the series revolves around three yokai (supernatural creatures), Bem, Bela, and Belo, who arrive at a large coastal city and come across an evil atmosphere, which was brought about by immoral behavior by humans and mischief caused by monsters and yokai. They, therefore, decide to stay in the city, fighting against other monsters and yokai which attack humans, making a few friends along the way. Even though the three yokai are often abused and discriminated against by other human beings due to their appearance, they still strive in protecting the human populace of the city from other monsters, one day hoping to become human beings in return for their good actions. (Source)
BEM Season 1 Episode 12 Release Date
Episode 12 of Season 1 of BEM will be released on 13 October 2019. Do watch the anime from official sources and support the anime release.