Mary is in her last course of school. She'll confront sudden changes in her life, loving relations and friendship. Based on some tweets of an anonymous girl.
Unfortunately the movie Mary Is Happy, Mary Is Happy. is not yet available on HBO Max.
| Directing | Nawapol Thamrongrattanarit | Director |
| Production | Rasiguet Sookkarn | Production Designer |
| Costume & Make-Up | Phim U-mari | Costume Designer |
| Camera | Pairach Khumwan | Director of Photography |
| Sound | Somsiri Sangkaew | Original Music Composer |
| Production | Aditya Assarat | Producer |
| Production | Pacharin Surawatanapongs | Associate Producer |
| Crew | Pairach Khumwan | Cinematography |
| Editing | Chonlasit Upanigkit | Editor |
| Editing | Chaitawat Thrisansri | Color Timer |
| Production | Rujirumpai Mongkol | Location Manager |
| Art | Manop Chaengsawang | Art Direction |
| Costume & Make-Up | Pacharin Surawatanapongs | Makeup & Hair |
| Sound | Akritchalerm Kalayanamitr | Sound Editor |
| Sound | Chalermrat Kaweewattana | Sound Editor |
| Writing | Nawapol Thamrongrattanarit | Writer |
