MBC's Friday-Saturday drama 'The Season of Your Brilliance' tells the unpredictable romance of 'Chan', a man who lives every day like an exciting summer vacation, and 'Ran', a woman who has confined herself to winter. Their fateful meeting awakens frozen time.
Previously, Sunwoo Chan (played by Chae Jong-hyeop) reunited with Song Ha-ran after seven years and discovered that she is still trapped in winter, despite saving his life twice. Sunwoo Chan, who was once the roommate of Ha-ran's past boyfriend Kang Hyuk-chan (played by Kwon Do-hyung), stayed by her side, hiding the truth that he had communicated with her on Hyuk-chan's behalf. Having regained his will to live through conversations with Ha-ran, Sunwoo Chan decided to lead her back to spring after she lost her smile following Hyuk-chan's death.
After reuniting with Song Ha-ran, Sunwoo Chan began experiencing trigger reactions such as tinnitus and visual disturbances, leading to the emergence of new memories related to the accident seven years ago. In episode 5, during a business trip to Gyeongju, Sunwoo Chan's memories flashed images of Kang Hyuk-chan and a mysterious woman, Cha Soo-jin (played by Lee Joo-yeon), making him realize that his memories might not be complete.
As his feelings for Ha-ran deepen, Sunwoo Chan wants to confess everything honestly, but he is torn by guilt for deceiving her and confusion from the newly surfaced memories. The presence of Cha Soo-jin adds to the intrigue surrounding the truth of the incident in Boston seven years ago. What secrets has Sunwoo Chan been hiding, and how will they impact his relationship with Song Ha-ran?
Kim Na-na (played by Lee Mi-sook), who lost her daughter and son-in-law in an instant, has been raising her three granddaughters alone while steadfastly growing 'Na-na Atelier'. However, as she begins experiencing severe forgetfulness and losing track of her whereabouts, she suspects she might have dementia.
Kim Na-na, hiding this from her granddaughters, plans to retire and pass on 'Na-na Atelier' to Song Ha-ran. With no official diagnosis yet, the question remains whether her suspicions of dementia are correct, and what choice Cha Yoo-gyeom (played by Kim Tae-young), the only one aware of her secret, will make.
'The Season of Your Brilliance' portrays the romance of four couples spanning generations from teens to seventies. The 'Na-man Couple' of Kim Na-na and Park Man-jae (played by Kang Seok-woo) depicts a twilight romance after reuniting after 50 years. The 'Chan-ran Couple' of Song Ha-ran and Sunwoo Chan grows their love by saving each other. The 'Ha-tae Couple' of Song Ha-young (played by Han Ji-hyun) and Yeon Tae-seok (played by Kwon Hyuk) showcases straightforward charm and tsundere chemistry. Lastly, the 'Ha-yu Couple' of Song Ha-dam and Cha Yoo-gyeom presents a fresh teenage romance, each offering a unique love story.