Selene and Kurama
"Or the afterlife, if you prefer. The first step on the path to existence after death, where spirits are judged and sentenced. Makai is the realm of the supernatural. Western society would call the inhabitants demons, for lack of a better term. We call the human world Ningenkai. All three dimensions exist in parallel." The fourth was long destroyed, and Kurama was glad to be rid of it.
"Most of the humans in Ningenkai have forgotten that youkai are real. Maybe that's for the best. They have enough difficulty tolerating the differences in each other.
"If your family could join you here, would you stay, given the option? Exchange this reality for the one you left behind?"