Humanoid Monster, Bem.

Bem, Bela and Belo arrive at a new town plagued by a series of mysterious, unsolved cases which, as they discover, are caused by another youkai, one more powerful than they have ever encountered. The story will also focus on Belo's first love, and his increasing desire to become human. In the meantime, Bem and Bela have found a way to become human, but are conflicted about whether to let just Belo turn human, or along with Belo, become humans themselves.