Jung-seok hesitates when IU advises him to rap. Unsure if he can do it, his team seeks Dynamicduo's guidance. Later, his secret YouTube channel soars.
| Name | Type | Role | |
|---|---|---|---|
| Jeon Mi-do | Guest Star | Self | |
| Yoo Yeon-seok | Guest Star | Self | |
| IU | Guest Star | Self | |
| Jung Kyung-ho | Guest Star | Self | |
| Kim Yoon-sung | Guest Star | Self | |
| Kim Dae-myung | Guest Star | Self | |
| Choiza | Guest Star | Self |