Join a playful bunch of pals on a musical, educational adventure all about understanding our feelings in this series inspired by famous Korean emoticons. Lee Sae-byeok, Jang Ye-na, Kim A-rong, Kang Eun-ae, Jung Yu-jung, Hong So-young, Han Mi-ri, Kim Yul, Hong Bum-ki, Jung Mi-ra Added on Netflix 2023-06-15.