★ Featuring Kakao Friends, Korea's beloved national cartoon characters, in an emotion-themed picture book series written by a Bologna Ragazzi Award-winning author. Focusing on sadness, fear, and anger, paired with an accompanying activity book. Adorable characters, heartwarming stories.
★ Helping children understand emotions through stories and play. Each volume authentically presents common emotional struggles children face. Rather than judging right or wrong, the series guides children toward accepting their feelings, learning to express themselves, and finding reconciliation.
★ Storybooks plus play-based exercises. The first three volumes are perfect for parent-child reading and discussing emotions together. Volume 4 (the activity book) uses colouring, stickers, mazes, and other hands‑on activities to help children reinforce emotional management and social skills through active participation.

The series includes 4 titles:
Tube and the Blanket Fort (Sad)
Apeach and Treasure Island (Afraid)
Muzi and the Icicle Ice Cream (Angry)
The Kakao Friends Feelings Activity Book

Muzi and friends get into a small argument. Anger freezes the forest like icicles. After venting, Muzi calms down and realizes that beneath the anger lies hidden sadness. Remembering happy moments, the icicles melt into ice cream. He gathers his courage and says, "I'm sorry." A picture book about anger, reconciliation, and emotional expression.

Young-eun An(Text)
Graduated from the Department of Child Studies at Sungkyunkwan University, and majored in Children's Culture at Sookmyung Women's University Graduate School.
Won the 2015 Bologna International Children's Book Fair Best Children's Book Award for The World's Biggest Cake. Currently a beloved television program writer for children. Her works include Hello, Tiger, I Want to Become a Witch, and Good Language Habits: Welcome to the Dialogue Kingdom!

Eun-ah Jo (Illustrations)
Active as an illustrator, also runs the brand Afternoon Chi, capturing moments noticed in everyday life.
Illustrated books include A Peach's Cooking: Searching for Donation Angels. She also created stage illustrations for the mobile game SupSup.