Cop Craft: Dragnet Mirage Reloaded

The story is set in San Teresa City on the fictional Pacific island of Kariaena. The "buddy police action" series follows the detective Kei Matoba and the alternate-world knight Tirana.
15 years ago, an unknown hyperspace gate opened over the Pacific. Beyond this gate lies Reto Semaani, a strange alternate world where fairies and demons live.
San Teresa City — a city where over two million immigrants live from both worlds. As a result, there are the haves and the have-nots. Here is the world's newest "city of dreams." But in the shadow of the chaos, crime is rampant: drugs, prostitution, and weapon trafficking. The detectives who stand up to these heinous crimes are in the San Teresa City Police. When the detective Kei Matoba and the alternate-world knight Tirana — two individuals who differ in gender, personality, and even world of origin — meet, an incident erupts. Two worlds. Two justices. From this, the curtain rises on a buddy police action story!
Written by Gatoh Shoji (Full Metal Panic!) and illustrated by Range Murata.
(Source: Anime News Network)