After a moment of silence, Xian said, "Well, you should actually already know something about this.
"There are many reasons why planar worlds come into being.
"Planar worlds like ours are born from films, anime, novels, and other works in higher worlds.
"After their creators create the worlds and characters in these works, countless people become their fans, and so they are born from people's beliefs.
"However, since these worlds exist only in people's imaginations, they have no actual physical form and can only rely on people's beliefs to sustain their existence.
"When people lose interest in a particular world or character, that world or character gradually disappears.
"Furthermore, if a creator abandons a work, the world corresponding to that work also faces the risk of collapse.
"So, although these worlds seem very real, they are actually extremely fragile and can easily be destroyed by all sorts of factors."
"Then why did you still name it the Xianran Continent?!"
"At the time, I wanted to see whether I could defy heaven and change my fate. Well, you saw the result."
"I see... Then why can you travel between different worlds?" Seiichi asked curiously.
"It's not traveling between different worlds. We follow the beliefs sustaining our plane back to their source to take a look. As long as we don't do anything that harms the world and simply act as travelers, its Heavenly Dao naturally won't interfere.
"Since we were born from belief, we will naturally also be destroyed because of belief." Xian sighed. "Whether the author botches the ending or nobody reads it anymore, leaving too little belief to sustain it, either will cause the planar world to collapse. That's the world-ending crisis I mentioned."
"But isn't there any other way?" Seiichi asked with a frown.
"Of course there is!