"Theory four..."
"Ruins of an ancient civilization."
"..."
"That's a nice gap."
"Isn't it?"
"It's my favorite spot."
"Looks comfy..."
"Is your house in the neighborhood?"
"Yep, yep."
"Ah, right, I forgot..."
"There have been more and more rocks around here lately."
"Huh."
"...No way an ancient civilization left them, then..."
"You're right. Fufufu..."
"They're dreamstones."
"Huh?"