Yeo-min is a matured and thoughtful 9 year old boy who lives in a small mountain village. Even at his young age, he has too many things to take care of. First, he has to protect his friends from the neighborhood bully Black Bird and keep peace in his neighborhood. Second, he must share his lunch with his best friend Ki-jong who lives alone with his sister. And, third, he has to sell ice cream bars after school to save enough money to buy a pair of sunglasses for his mother who injured her eye while working at a factory.
| Actor | Role |
|---|---|
 Kim SeokBaek Yeo-min | Baek Yeo-min |
 Lee Se-youngJang Woo-rim | Jang Woo-rim |
| 나나아현Oh Geum-bok | Oh Geum-bok |
| 김김명재Shin Gi-jong | Shin Gi-jong |
 Jung Sun-kyungYeo-min's mother | Yeo-min's mother |
 Ahn Nae-sangTeacher | Teacher |
 Ji Dae-hanYeo-min's father | Yeo-min's father |
 Choi Deok-moonPark Pal-bong | Park Pal-bong |
 Seo Jin-wonHa | Ha |
 Shin Jung-keunJebi's father | Jebi's father |
 Jung Ae-yeunKim Yoon-hee | Kim Yoon-hee |
| NNo Hyeon-jeongJebi's mother | Jebi's mother |
 Lee Young-sookWoo-rim's mother | Woo-rim's mother |
 Go Seo-heeShin Gi-soon | Shin Gi-soon |
 Choi SungPrincipal | Principal |
| KKim Myeong-sinChoi Neung-ja | Choi Neung-ja |
| KKim Kyu-minClass president | Class president |