When Sanlian's ex-husband passes away, she discovers he has altered his insurance policy, cutting out their son in favor of a stranger named Jay.

Hsieh Ying-shiuan
as Liu Sanlian

Roy Chiu
as Jay

Joseph Huang
as Song Chengxi

Spark Chen
as Song Zhengyuan

Ai-Lun Kao
as Jay's Mother

Wanfang
as Consultant

Danny Liang
as Stage Manager Allen

Yang Li-Yin
as Sanlian's Sister

Chung Hsin-ling
as Radio Voice (voice)

Ting-Chien Wu
as Director
badelf
> "Do you know that adults are the stupidest creatures on earth? They think they can just make up stories to hide secrets." This is the most creative love triangle film I've ever seen (and not just because one corner is gay). The story is told from the point of view of the boy, maybe 10 years old...
Alunauwie
Dear Ex explores emotional turmoil in a love triangle involving a widow, her son, and her late husband’s male partner, highlighting themes of betrayal, acceptance, and healing. Through shifting perspectives and deeply moving performances, the film delivers a powerful story with sincerity and emotion...