Throughout endless ages, the barrier around the Spirit Realm had always been unbreakable. Even though most of its inhabitants lived long lives and wielded great power, no one had ever wanted to break through it, just as home-loving introverts would never destroy their beloved house just to go outside.
Then, one day, the barrier opened a perfectly round door all by itself. Every Spirit Realm being who crossed through out of curiosity arrived in a different world, bringing their authority with them...
Theme: Every loneliness eventually comes to an end
