Kim Nam-woo struggles through life as people around him constantly leave him; his best friend, Jun-ho, is going to study in Seoul and in some ways his widowed mother is "leaving" him too by paying more attention to her new boyfriend. To escape, he goes to a dream world, where he meets a girl named Mari. The story follows Nam-woo in discovering himself and maturing.
Unfortunately the movie My Beautiful Girl, Mari is not yet available on HBO Max.
| Directing | Lee Sung-gang | Director |
| Writing | Kang Su-jeong | Writer |
| Writing | Lee Sung-gang | Writer |
| Writing | Seo Mi-ae | Writer |
| Sound | Lee Byung-woo | Original Music Composer |
| Crew | Geun-wook Kwon | Cinematography |
| Writing | Ji-Hoon Hong | Storyboard |
| Sound | Cesar Inserny | Sound Designer |
| Production | Jeong Tae-sung | Producer |
| Production | Seong-weon Jo | Producer |
| Production | Jay Choi | Executive Producer |
| Editing | Park Gok-ji | Editor |
| Production | Tcha Sung-jai | Executive Producer |
| Production | Cho Seong-won | Executive Producer |
| Directing | Carl Macek | Director |
| Crew | Carl Macek | Script |
| Production | Carl Macek | Producer |
| Production | John Ledford | Executive Producer |
