Gokurakugai

Gokurakugai, a bright and bustling working class district with a hidden dark side. In this area without order, Tao and Alma work as troubleshooters for hire. Their missions involve helping a young boy find his lost friend, a person who dissapears without a trace, and disfigured animal corpses. All the while, the evil spirits who live in the shadows bring out a different side to these troubleshooters!

(Source: MANGA Plus)