Himchan's hope project of climbing a 100-story apartment building!
Hidden Stories of Neighbors: "Garbage Earth! Goodbye!"

Himchan, who lives on the first floor of a 100-story apartment building, climbs the stairs to the rooftop to board a spaceship from the clean planet.
Why do you walk instead of taking the elevator? It's because my dad told me to take the stairs to save electricity.
We live in a very comfortable world.
How much electricity can we save if one person rides the elevator? But leaving the television on in the living room unused, leaving the air conditioner on in an empty room, and randomly pressing elevator buttons are all wasteful.
Also, frequent consumption of disposable products and throwing away a lot of food waste are making the Earth sick.
As Himchan climbs the stairs, he meets many neighbors like that.
It wasn't just one person.
So how can we avoid having to climb 100 floors of apartment buildings? Let's learn how to save the planet with Himchan.

My father suddenly grabbed my hand and made me sit on the floor.
Then he let out a long sigh.
The atmosphere is unusual.
I swallowed hard and looked at my father's face.
The stubble on my father's unshaven face felt strangely unfamiliar today.
“Dad, I’m going to take a spaceship to a clean planet right now.”
--- p.15

Dad doesn't seem to be busy.
If you look at the nagging in text, you can see that.
If my dad hadn't sent me three exclamation points, I would have snuck into the elevator.
Because our house is on the first floor and our apartment is on the 100th floor.
--- p.22

Saetbyeol appeared to be a monster destroying the environment.
I really need to give up on my feelings for Saetbyeol.
“I drank a lot of water.
“I’ll go.”
"What? Did you really come all the way here to drink water? Don't you have water in your house?"
“No, I’m on my way up to the rooftop now.”
--- pp.46-47

My mind wanted to hurry, but my body couldn't.
My body felt heavy, like cotton soaked in water.
'Okay, let's take a break for a moment.'
I collapsed on the 63rd floor stairs.
I was so tired after climbing the stairs in the morning.
My eyelids fell down on their own.

--- p.60

Hyeju said, snatching the bowl of food.
“If you don’t want to eat it, don’t eat it!”
I was hungry, but I didn't want to eat any more.
“Hyeju, didn’t I tell you not to say that to your friends?”
Hye-ju's mother, who said that, threw the leftover food into the food waste bin without a second thought.

--- p.79