Bem, a monster resembling a gangster, along with Bero, a being that looks like a child, and Bera, a witch-like creature, serve as agents of justice, aiming to earn their place as humans. Their efforts often involve safeguarding a young boy, a recurring focus throughout the series. The unique animation style and varied storylines make for an engaging viewing experience. The series explores the complexities of their existence as Youkai, or supernatural creatures.