Description: When you open the first page, you see a plain white background with the words "What on earth happened while..." written across it. What could it mean? As you look closely, you notice three curved, arc-like lines drawn on the page. They aren't connected to each other, but together they seem to suggest some kind of movement — as if sketched gently with colored pencil. Turning the next page, you understand: those curved lines connect to form the back of a rabbit! Just below it lies a single small rabbit dropping. The sentence continues from the previous page: "...what happened?" Eager to find out, you turn the page again — and oh my! There sits a rabbit, quietly perched on an apartment balcony. It looks just like an ordinary pet rabbit. But on the next page, the rabbit slowly stands up and, just like a person, opens the balcony door and sneaks into the empty house. Goodness! And that's just the beginning — the rabbit's antics only get better. It opens the fridge, grabs a late-night snack, and sits at the table to eat just like a person would. It munches on cookies while watching videos, and even hops up to the lady's vanity table to try on makeup. Who knew a rabbit with red lips could look so charming! Like a child left home alone trying out everything it's always wanted to do, the rabbit hops through every corner of the house — trying on pretty new clothes, riding roller blades, and finally falling into a deep, cozy sleep on the bed. Then, just before the family returns, the rabbit slips back out to the balcony and sits there quietly, as if nothing happened at all. But inside the house — did anyone notice? Scattered here and there are little rabbit droppings, left behind after each new adventure. Flipping back through the pages just to look at the pictures, you'll spot them again and again — the only clues to the rabbit's secret escapades, and the charming link between reality and imagination. When the family comes home, they can only tilt their heads in confusion and wonder aloud, "What on earth happened here while we were gone?" This delightful story was written and illustrated by Lee Ho-baek, the creative mind behind other beloved titles such as The Strongest Rooster in the World and The Goblin of Ppokki Ppokki Forest.