Happiness (2007) — Cast
Cast
| Gong Hyo-jin | Ki-soo |
| Jang Jin-hee | Nurse |
| Park In-hwan | Mun-seok |
| Oh Seo-won | Pharmacist |
| Kim Ki-cheon | Bu Boui |
| Lim Soo-jung | Eun-sil |
| Yoo Seung-mok | Jae-yeong |
| Ryu Seung-su | Joon-pyo |
| Hwang Jung-min | young Bell |
Crew
| Kim Bo-ram | Line Producer |
| Kim Hyung-koo | Director of Photography |
| Kwak Jung-ae | Costume Design |
| Jung Young-min | Lighting Director |
| Seo You-min | Screenplay |
| Lee Won-sik | Adaptation |
| Kim Hyo-kwan | Screenplay |
| Lee Jung-hwa | Script Supervisor |
| Shin Joon-ho | Screenplay |
| Hur Jin-ho | Director |
| Lee Suk-yeon | Screenplay |
| Choi Jae-geun | Editor |
| Lee Eugene | Producer |
| Lee Jung-hwa | Storyboard |
| Lee Jung-hwa | Screenplay |
| Hur Jin-ho | Writer |