The Red Envelope (2025, dir Chayanop Bunprakob)

Original title (TH): Sxng dæng tæ̀ng p̄hī (Red envelopes for ghosts)

When Menn (Putthipong Assaratanakul), a super-straight mugger-turned-police spy, accidentally picks up a mysterious red envelope, he is bound by a supernatural contract that forces him to wed a ghost. Fate plays an even crueler trick on him: his "spouse" is not only dead, but a cute and unapologetically progressive gay man named Titi.

https://www.themoviedb.org/movie/1317920