Episode 1: I'm Not Laughing, I'm Not Laughing 08
Why does tickling burn?
Episode 2: The Black Dust of Terror 16
Why do flies hover around light bulbs?
Episode 3: Amy's Elegant Morning 24
If I remove mold from bread, is it still edible?
Episode 4: The Common Siblings' Emergency Response Meeting 32
Why does cheonggukjang smell bad?
Episode 5: A Special Pizza for Amy 40
Why is pizza round?
Episode 6: Uncommon Crab Catching 48
Why do shrimp and crabs turn red when cooked?

Warm-up Quiz (1) 56

Episode 7: The Secret of the Tree-lined Road 58
Why do banks smell so bad?
Episode 8: 16 Years with Boogers 66
If you keep picking your nose, will your nostrils get bigger?
Episode 9: My Slippery, Cute Friend 74
Why is snail mucus sticky?
Episode 10: Hell's Express Bus 82
Why do we get motion sickness?
Episode 11: A Special Way to Hide Snacks 90
Why do squirrels put food in their bowls?
Episode 12: The Curse of the Terrible Panda 98
Why are bruises blue?

Warm-up Quiz (2) 106

Episode 13: The Ordinary Siblings: The Secret of Their Birth? 108
Why do family members have different blood types?
Episode 14: It's Raining Carbonated Water~!♬ 116
Why does a carbonated drink spray out when shaken hard?
Episode 15 I Hear Your Voice 124
How do parrots imitate human speech?
Episode 16: I'm Going to Meet You Now 132
Why do I get a flu shot?
Episode 17: The Mystery of the Red Brick House 140
Why do cat eyes glow at night?
Episode 18: Eun-teum's Fatal Charm? 148
Why do dogs keep sniffing?

Warm-up Quiz (3) 156
Curiosity Level Up 158
Special Commendation Award 163

Are you dying of curiosity? I'm dying of curiosity!
18 scientific curiosities encountered in everyday life
Flu vaccinations begin around the time the cold winds begin to blow! Do you know how flu shots prevent the flu? Volume 4 of "Common Siblings' Common Curiosities" collects 18 curiosities you've likely wondered about at least once in your life, including "Why do we get flu shots?", "Is it okay to eat bread if I remove mold?", "Why do ginkgo nuts smell so bad?", and "Does constantly picking your nose make your nostrils bigger?"

Perfectly linked to elementary science curriculum!
Satisfy your curiosity with our informative pages!
You can learn various scientific knowledge related to elementary science curriculum through the information pages inserted at the end of each episode.
In addition, we provide more diverse information through short sections such as 'Common Science Knowledge', which explains basic scientific concepts related to curiosity topics, and 'Short Curiosities', which introduces useful tips related to real life.


Scientific knowledge in your head!
I'm also a curiosity doctor with the common siblings!
Rather than simply listing scientific information, it is structured so that young readers can naturally learn core concepts while enjoying a variety of activities.
In the 'Warm-up Quiz' corner inserted once every six episodes, you can learn the key concepts learned in the text by solving simple quizzes such as the initial consonant quiz, the four-headed question quiz, and the crossword quiz. In the 'Curiosity Level Up' corner inserted at the end of the book, you can review the content learned in the text as a whole by solving fun four-option multiple-choice questions.
As you read the comics and solve the problems, the scientific information in the text will become ingrained in your head without you having to memorize it.

The one and only award in the world!
Nyaha Curiosity Solver Special Commendation Award
At the end of the book, there is a one-of-a-kind award in the world.
This is a special commendation award given by the Nyaha Curiosity Solution Group.
After solving all 18 curiosities through "Common Siblings' Common Curiosities," you can write your name on the award and grow your sense of accomplishment.