[ The last time she had to explain it was to Ryunosuke, when they visited the hot springs. She thinks back... ]

It is a realm that also did not exist for most people, in a way. Certainly not for me.

That I have learned, it is the realm where the Story Eater originates. Those who were pulled in were assigned a role from a story... and they were tasked with restoring that story by someone called the Storyteller.