The fifteenth day of Desert Island Survival, overcast.
A light rain had fallen yesterday. With the sound of rain lulling him to sleep, Yu Hai had slept soundly.
But this morning, Poliwag's urgent cries woke him up.
"Yo, yo, yo, yo! Yo, yo, yo, yo..."
"Poliwag, what happened? Why are you calling so urgently?" Yu Hai had just gotten up when he saw the wooden door fall inward into the treehouse.
This wooden door had never been reinforced. It was still the same as before, simply leaning against the tree trunk. Even a slight breeze could knock it down. If he had time today, he needed to reinforce the flimsy door.
When he reached the doorway, he saw a Caterpie outside, curled up on the ground with a broad leaf covering its body.
The moment he saw the Caterpie, he froze.
Why was there a Caterpie at the treehouse entrance? Wasn't this breakfast delivering itself to his door?
But Poliwag's reaction was all wrong. Instead of looking excited at the sight of breakfast, it seemed anxious.
"Poliwag, what's wrong with this Caterpie?" Yu Hai crouched down and asked Poliwag, the first one to discover it.
"Yo, yo." Poliwag dipped its tail into the cool water by the door and placed it on Caterpie's forehead, telling Yu Hai that Caterpie's forehead was scorching hot.
Caterpie's symptoms were exactly the same as Yu Hai's before—her forehead was burning hot.
After demonstrating it with its tail, Poliwag trusted that Yu Hai would understand.
"A cold and fever?" Yu Hai reached out and touched Caterpie's forehead. It really was hot.
Then he moved his palm down and touched Caterpie's body. It was just as hot.
Once he realized Caterpie likely had a cold and fever, he immediately carried her into the treehouse. He used