Their first morning of wilderness survival.
Both of them were up early.
Chen Shu paced back and forth along the shore, pinching his chin as he considered how to build a device to extract fresh water from seawater. The thought of using his own ingenuity to secure an endless supply of fresh water and solve the crisis looming over him and Qingqing filled him with a tremendous sense of accomplishment.
Make full use of what they had brought.
A pot, a stove, mineral-water bottles, and so on.
Make full use of what they could find on the island.
He did not know what the island had yet.
Make full use of the power of Spells and Runes.
"Hmm..."
After four or five trips back and forth, Chen Shu finally had a rough idea. But when he turned around—
Qingqing stood a dozen or so meters behind him, a toothbrush in one hand and a bottle of mineral water in the other. She watched him expressionlessly as she brushed her teeth. Just as he looked over, she took a mouthful of water.
"Gurgle, gurgle..."
"Pfft!"
All right, there was no fresh-water crisis for now.
Chen Shu set his plans aside.
Ning Qing glanced at him.
"Aren't you brushing your teeth?"
"I have the Teeth-Cleaning Technique."
"?"
"It's a Spell that uses ultrasound to remove plaque. Use it every few days and your teeth stay healthy—ten thousand times healthier than with brushing."
"So you only brush your teeth every few days?"
"It's for emergencies! I usually use a toothbrush at home too..." Chen Shu paused. "You can use the Teeth-Cleaning Technique every day, though."
"Did you forget your toothbrush?"
"...I left it on the ship."
"I brought one."
"Great."
The Teeth-Cleaning Technique worked well, of course, but it worked even better with