Hiromu Arakawa’s 2000 Demons of Shanghai (Shanghai Yōmakikai) was a short-lived urban-fantasy manga.
Shanghai in 2050 is a thoroughly modern city with thoroughly modern amenities. Alas, it is also home to more traditional beings: gods, demons, and other supernatural entities. Such creatures are more than the city officials, even the police, can manage.
For those, the city has no choice but to reluctantly call on the Demon Taoists Corporation.