After losing his family when he was young, Nam-soon feels no pain. He cannot feel physical pain and is emotionally barren until he meets Dong-hyeon, who calls herself a vampire because she suffers from hemophilia. Unlike Dong-hyeon, when Nam-soon is injured, she bleeds from even the smallest wound. As the two grow closer, Dong-hyeon suddenly begins to lose his lifelong insensitivity to pain and the hurt of a lifetime washes over him.
Unfortunately the movie Pain is not yet available on HBO Max.
| Crew | Kim Won-jin | Stunts |
| Sound | Jin-ho Jung | Original Music Composer |
| Directing | Kwak Kyung-taek | Director |
| Writing | Kang Full | Writer |
| Production | Jun-suk Jung | Producer |
| Crew | Park Jung-ryul | Martial Arts Choreographer |
| Sound | Jeong Jin-ho | Original Music Composer |
| Visual Effects | Cho E-suck | VFX Supervisor |
| Sound | Jung Hyun-su | Production Sound Mixer |
| Visual Effects | Mun Byeong-yong | Visual Effects |
| Editing | Kim Sang-bum | Editor |
| Crew | Kang Pooung | Martial Arts Choreographer |
| Visual Effects | Kim Gwang-su | Special Effects Supervisor |
| Writing | Kang Full | Original Story |
| Writing | Suryeon Han | Writer |
| Visual Effects | Park Yo-seop | Special Effects Supervisor |
| Camera | Hwang Ki-suk | Director of Photography |
| Production | Lee Ji-seung | Executive Producer |
| Editing | Kim Jae-beom | Editor |
| Production | Gu Seong-mok | Executive Producer |
| Costume & Make-Up | Kye Seon-mi | Makeup & Hair |
| Editing | Yang Jin-mo | Assistant Editor |
| Sound | Kim Dong-wook | Original Music Composer |
| Art | Park Young-chan | Production Design |
| Editing | Kim Il-kwang | Digital Intermediate |
