Killing Ghosts is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

In this era, demons and monsters roam the streets at night. Humans and familiars work as partners who kill those monsters. Civil servant Fan Xiaotie and the strongest demon girl Linyu of the secret department “Supernatural Affairs Armed Response Team” must face endless crisis.