Cast & crew
Protect the Boss (2011)
Directed by Son Jeong-hyeon Written by Kwon Ki-young
Cast
| Ji Sung | Cha Cha DiGregorio |
| Kim Yeong-ok | Song Liling |
| Park Young-kyu | Chairman |
| Choi Kang-hee | Seol |
| Kim Ha-kyoon | Jang |
| Cha Hwa-yeon | Shin Yoo-Shin |
| Kim Jae-joong | Cha Cha DiGregorio |
| Jang Ah-young | Yang |
| Wang Ji-hye | Yoon Bom |
Crew
| LYN | Theme Song Performance |
| Heo Young-saeng | Theme Song Performance |
| Brian Joo | Theme Song Performance |
| Shownu | Theme Song Performance |
| Kwon Ki-young | Writer |
| Kim Jae-joong | Theme Song Performance |
| Hwang Kwang-hee | Theme Song Performance |
| Kim Ye-won | Theme Song Performance |
| Hwanhee | Theme Song Performance |
| Son Jeong-hyeon | Director |