Let's Exorcise Demons with the Girls in the Future World

I thought I was going to die alongside the Muddy Water Corpse King, but to my surprise, I transmigrated to the future, arriving in the Demon City of 3035. The golden-haired, blue-eyed girl with twin tails is Alice, an AA-rank agent with the United Nations Special Affairs Investigation Bureau. The black-haired, black-eyed girl in a school uniform is Xiao Ya, my great-great-great-granddaughter, though I have no idea how many generations removed... As their ancestor, I have a real soft spot for capable younger generations like them. So I'll just go along with them for now and keep slaying demons and exorcising evil in the mortal world.