Rene Liu successfully delivers the complex role of Mi, who chooses to remain single rather than risking the slightest chance of being dumped. She loves her friend Nan more than anyone, yet she asks him to be her best friend instead of boyfriend. For ten years, he wishes her a happy birthday no matter how far they are geographically apart or who they are with. However, this year his greeting arrives 42 hours late...
Unfortunately the movie Happy Birthday is not yet available on HBO Max.
| Writing | Sylvia Chang | Screenplay |
| Directing | Jingle Ma Choh-Sing | Director |
| Writing | Theresa Tang Kit-Ming | Screenplay |
| Writing | 胡恩威 | Screenplay |
| Writing | René Liu | Screenplay |
| Production | Eric Tsang-Chi Wai | Producer |
| Sound | Chan Fai-young | Original Music Composer |
| Camera | Jingle Ma Choh-Sing | Director of Photography |