Until they appeared

In fact, even Gem was a little puzzled about the situation. "That's true. Sesame, as I said, you can't leave this place. However, why is there a fragment of the Foundation Pillar here? Also, what is happening with this messed up space-time around this place?"

However, Roan was more thorough. "First, isn't it better to tell us what this place is exactly? As far as I know, this is not the kind of environment you would find in the Underworld. Lush forests? Brimming life? Above all, this place seems to be sealed by that wall."

Gem knew something about it. "I could tell you what I know, but my knowledge of this place is from a long time ago. It's better if Sesame explains to you all and then continues with the answer to my question next."