My Happy Ending (2023) Plot Summary & Ending Explained

At the end of My Happy Ending, the story wraps up in a way that emphasizes acceptance and healing. Jae-Won, who has struggled with bipolar disorder throughout the series, finally reaches a point of self-acceptance. After her trial, which sees her father declared guilty only of insurance fraud thanks to the evidence she collected, she steps back from her role as CEO to focus on her mental health. She takes a solo trip, during which she continues to hallucinate but also finds moments of peace, even communicating with her deceased mother—a symbolic act that allows her to confront her past pain and find closure. She asks her mother why she tried to harm her all those years ago, and in doing so, she finally gets answers that help her let go of her guilt and resentment.

Meanwhile, Yoon-Jin's story culminates with her impulsive act of kidnapping Ah-Rin at the airport. Ultimately, her behavior reveals her unstable psyche, and she ends her life after being hit by a truck, a moment that signifies her own punishment and the tragic end of her villainous role. Her last thoughts involve regret and a desire to prove herself to her father, which remained unfulfilled.