Wicked City (妖獣都市 Yōjū Toshi^?) is an animated horror neo-noir directed by Yoshiaki Kawajiri, based on Hideyuki Kikuchi's novel of the same name.
The story takes place towards the end of the 20th century and explores the idea that the human world secretly coexists with the demon world with a secret police force known as the Black Guard protecting the boundary.
This is a classic anime movie it just reminds of the movie men in black.

Wicked City