The next day, Bomi had a slight stomachache since morning.
My stomach hurt, so I walked around the school wall, wondering if I really had to go to school.
Today, too, I might hear Mr. Ppoong's 'cannon fart' because of my shoelaces.
Bomi felt like her stomach was tightening.

That was then.
I saw graffiti on the wall next to the back door.
Bomi went closer, crouched down, and looked closely.

Dr. Byeolnyang's Odd Infirmary
“If you have a stomachache or a headache,
When you cut your finger or have a problem that you can't express
A place to go secretly.
Dr. Byeolnyang's quirky infirmary!!
--- p.11~12

Ah, the thoughts that Bom had in her mind became real sounds and came out of the speakers.
Nurse Nyongnyong laughed heartily.
Dr. Byeolnyang opened his eyes.
And this sound came out of the speaker.
“Actually, it’s not that I don’t want to go to school, it’s that I want to be a kid who can do everything well on his own.”
--- p.29

“If you lie down like that at school, you’ll get in trouble.
You should sit upright in your chair with your back straight.
Like this.
“All day long.”
Junseo said, sitting up straight.

"What? All day? I have to sit still with my back straight. That, that's just awful!"
--- p.57

The bandage around Damhee's little finger gradually became wider and higher, and a huge strawberry-shaped bandage was completed.
The bandage was so big that I had to support it with my other hand.
“Wow, it’s pretty.”
Damhee was proud of her strawberry bandage.

--- p.105

Children, is life worth living?
Life isn't easy for children or cats.

I used to try really hard to be a 'better cat'.
As I was thinking about it, my stomach hurt, my head hurt, my fingers were twitching, I couldn't sleep, and my heart was aching.
So now I'm trying to be a 'cat that takes care of itself' rather than a 'better cat'.

--- From the author's note