Two little girls stood beside a waterfall, one was taller than the other, perhaps to show their age difference. White water thundered from the cliffs above and vanished into a dark pool below, filling the valley with mist and noise. They had been warned all their lives never to enter the water, though no one had ever explained why.
The elder sister always obeyed the warning and was satisfied.
"Rika? What do you think would happen if I jumped into the waterfall? I mean, I know how to swim," the little one said with excitement.
"Rina, you can't. What if it does not have a bottom and you never return?" Rika said, holding Rina's hand and pulling her back on instinct as if she was going to jump at any moment.
"But then we will never know. Perhaps it is shallow, and I will float right back." Rina insisted.
"If you keep saying such nonsense, I will tell Mom and Dad, and they will not allow you to come play here anymore," Rika threatened.
