The parallel world is imaginary, the background is the Victorian period, there will be many non-existent cities and towns, you are right to argue.
Gray x Shen Yanbing, a priest guilty of heresy x a Taoist priest who betrayed his sect, a sand sculpture dog attack x a poisonous tongue beauty, a joy of bickering every day.
Lu Zhaoran, Shen Yanbing, and Gray are three members of the Night Patrol Detective Agency in Bridgegard City. This detective agency mainly deals with supernatural incidents (probably). Although the three of them are very poor and have nothing to do for about 300 days out of 365 days a year, it is still a happy story (probably).
Concept: Probably a horror novel!