Chae Jong-hyeop's Hidden Trauma Surfaces in Gripping 'Your Brilliant Season' Episode 4

MBC's Friday-Saturday drama Your Brilliant Season takes a dramatic turn in Episode 4, as Chae Jong-hyeop's character Sun-woo Chan reveals a deeply hidden trauma that sheds new light on his past. The episode, which aired on February 28 at 9:50 PM KST, sees Lee Sung-kyung's character Song Ha-ran witness a vulnerable side of Sun-woo Chan she had never seen before.

The pivotal moment unfolds when Sun-woo Chan takes the wheel to drive Song Ha-ran to meet her grandmother Kim Na-na, played by veteran actress Lee Mi-sook. A sudden motorcycle horn triggers an involuntary trauma response in Chan, causing his vision to blur and severe tinnitus to overwhelm his senses. He is forced to pull the car over, bowing apologetically to the motorcycle rider while struggling to compose himself.

A New Side of Sun-woo Chan

Song Ha-ran, who has only known Chan as a warm and reassuring presence, watches the entire episode unfold with a mix of shock and deep concern. The scene marks the first time she witnesses his hidden vulnerability, adding a new emotional layer to their slowly deepening relationship. Her worried gaze speaks volumes, hinting that Chan's revelation may become a turning point in how she perceives and cares for him.

The couple had just reached a significant milestone in their relationship during Episode 3. After Chan proposed a "three-month trial neighborhood friendship," Ha-ran finally accepted, marking her first step toward opening up after years of guarding herself against emotional connections. The two had begun spending time together, and their dynamic was shifting from cautious distance to genuine warmth.

The Weight of the Past

Episode 3, which recorded a 4.3 percent nationwide viewership rating according to Nielsen Korea, provided crucial backstory about Chan's painful childhood. Viewers learned that he lost his art-loving mother at a young age and grew up under the oppressive demands of a father who blamed art for the family's tragedy. Despite enrolling in engineering school in the United States, Chan could never abandon his passion for painting.

Seven years ago, at his lowest point when he was ready to give up on everything, a message from Ha-ran arrived: "You saved me." That single sentence became the reason Chan chose to keep living. Now, reunited with the woman who unknowingly rescued him, Chan finds himself wanting to return the favor by helping Ha-ran rediscover her own happiness.

A Surprise Wedding Announcement

Adding further intrigue to the episode, Ha-ran's sister Song Ha-dam, portrayed by Oh Ye-ju, drops a bombshell by announcing her surprise marriage to boyfriend Cha Yu-gyeom, played by Kim Tae-young. When Yu-gyeom visits the family home to formally introduce himself, an unsettling tension emerges between him and grandmother Kim Na-na. The mysterious connection between the two characters and whether Na-na will accept the sudden engagement promise to be key plot threads moving forward.

Written by Jo Sung-hee and directed by Jung Sang-hee and Kim Young-jae, Your Brilliant Season continues to weave a tender narrative about healing, second chances, and the courage it takes to let someone into a wounded heart. With Chan's trauma now exposed and Ha-ran's protective instincts awakening, the drama sets the stage for its central romance to deepen in meaningful and emotionally resonant ways.