In Your Radiant Season
In Your Radiant Season (Korean: 찬란한 너의 계절에) is an ongoing South Korean television series written by Jo Sung-hee, directed by Jeong Sang-hee and Kim Young-jae, and starring Lee Sung-kyung and Chae Jong-hyeop. The series tells the story of Sunwoo Chan, who lives life to the fullest, and Song Ha-ran, who is stuck in her emotions, and how their connection brings warmth and change to both their lives when they meet. It premiered on MBC TV on February 20, 2026, and airs every Friday and Saturday at 21:50 (KST). It is also available for streaming on Disney+.
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In Your Radiant Season
In Your Radiant Season (Korean: 찬란한 너의 계절에) is an ongoing South Korean television series written by Jo Sung-hee, directed by Jeong Sang-hee and Kim Young-jae, and starring Lee Sung-kyung and Chae Jong-hyeop. The series tells the story of Sunwoo Chan, who lives life to the fullest, and Song Ha-ran, who is stuck in her emotions, and how their connection brings warmth and change to both their lives when they meet. It premiered on MBC TV on February 20, 2026, and airs every Friday and Saturday at 21:50 (KST). It is also available for streaming on Disney+.
Synopsis
In Your Radiant Season
In Your Radiant Season follows Sunwoo Chan, a cheerful animator who loses his hearing and memory after a mysterious accident, and his journey with Song Ha-ran, a talented designer who becomes his savior, as they navigate their complicated pasts and relationships.
Cast
Main
• Lee Sung-kyung as Song Ha-ran • Go Hae-won as young Haran
The eldest sister of the three sisters. She's the head designer at Nana Atelier, Korea's top fashion house, hiding behind a perfect image. She's trapped in grief, still hurting from past losses. Then she meets Sunwoo Chan, and her carefully controlled world starts to fall apart.
• Chae Jong-hyeop as Sunwoo Chan • Jung Min-joon as young Chan
A character designer at a top animation studio. Behind his sunny personality, he harbors deep scars from a mysterious accident in the past that caused him to lose his hearing and memory. But when he meets Ha-ran, he's forced to face a shocking secret.
Ha-ran's family
She is the maternal grandmother of the three Song sisters, and the head of Nana Atelier, South Korea's top high-end fashion house. She is a first-generation designer who is a perfectionist with a cold, sharp professional image, earning her the nickname "the Anna Wintour of Korea".
• Han Ji-hyun as Song Ha-young • Yoon Seo-yeon as young Ha-young
She is the younger sister of the protagonist Song Ha-ran and the older sister of Song Ha-dam. She often acts as a protector for Ha-ran against their pushy grandmother, Kim Na-na. She also works as a junior designer on the design team at Nana Atelier.
She is the youngest sister. Though she appears to be the most resilient sister—ranking first in her class and handling her affairs independently—this is actually a survival tactic to avoid being seen as a "pitiful child" due to her family's past.
• Kang Ae-shim as Chan's grandmother (Kim Seon). She is a master ceramicist. Unlike Chan's father, Sunwoo Seok, who is authoritarian and distant, his grandmother provides an emotional safety net. • Jung Hae-kyun as Chan's father (Sunwoo Seok): He is a central figure in Chan's "painful past". Flashbacks reveal that Seok was emotionally and sometimes physically cold toward Chan, eventually sending him abroad to the U.S. to get him out of sight after Chan refused to follow the family's ceramicist path.
People around the Song family
• Kang Seok-woo as Park Man-jae
He is a barista and runs a quiet alleyway café called "Rest". He acts as a life senior and advisor to the younger generation and has a past with Kim Na-na.
He is a top national high school baseball pitcher and Ha-dam's boyfriend. He shares a special bond with Ha-dam's grandmother, acting as a reliable grandson figure to her.
Nana Atelier
• Kwon Hyuk as Yeon Tae-seok
He serves as the COO of Nana Atelier and is the loyal "right-hand man" to the company's head. It is slowly revealed that his connection with the Nana family and Nana Atelier dates back 15 years.
• Ki Hyun-woo as Baek Seung-gyu
A junior designer in the Design Team 1 at Nana Atelier.
People around Chan
• Firas A. Naji as Ben - A friend or colleague from Chan's time in the United States and current work acquintance. • Kwon Do-hyung as Kang Hyuk-chan - He was Sunwoo Chan's university colleague in the U.S. and Song Ha-ran's former boyfriend who tragically died in the explosion seven years ago.
Production
Development
The series is planned by Namgoong Sung-woo, co-directed by Jeong Sang-hee and Kim Young-jae, written by Jo Sung-hee, and produced by Pan Entertainment.
On November 13, 2025, Pan Entertainment announced that it had signed a production and supply agreement with MBC worth ₩15.2 billion.
Casting
In 2023, Han Hyo-joo was initially cast as the female lead, but was later recast with Lee Sung-kyung considering it and Seo In-guk considering the male lead.
In May 2025, Chae Jong-hyeop reportedly received an offer to play the role of Sunwoo Chan, which was initially offered to Seo. In September, the casting of Lee and Chae as the leads was officially confirmed. The next month, Lee Mi-sook, Kang Seok-woo, Han Ji-hyun, Oh Ye-ju, and Ki Hyun-woo joined the cast.
Filming
Principal photography began in October 2025.
Release
In Your Radiant Season
In Your Radiant Season was reportedly scheduled to premiere on MBC TV in the first half of 2026. On January 13, 2026, a script reading was revealed, and the series officially confirmed its premiere on February 20, 2026, airing on a Friday–Saturday timeslot at 21:50 (KST). It will also be available for streaming on Disney+.
Viewership
In Your Radiant Season
<table><thead><tr><th>Ep.</th><th>Original broadcast date</th><th>Average audience share (Nielsen Korea)</th></tr></thead><tbody><tr><td>Nationwide</td><td>Seoul</td></tr><tr><td>1</td><td>February 20, 2026</td><td>4.4% (11th)</td><td>4.4% (10th)</td></tr><tr><td>2</td><td>February 21, 2026</td><td>3.5% (14th)</td><td>3.2% (13th)</td></tr><tr><td>3</td><td>February 27, 2026</td><td>4.3% (11th)</td><td>4.1% (10th)</td></tr><tr><td>4</td><td>February 28, 2026</td><td>3.1% (18th)</td><td>3.1% (16th)</td></tr><tr><td>5</td><td>March 6, 2026</td><td>4.1% (11th)</td><td>4.1% (9th)</td></tr><tr><td>6</td><td>March 13, 2026</td><td>2.9% (18th)</td><td>2.7% (18th)</td></tr><tr><td>7</td><td>March 14, 2026</td><td>2.8% (21st)</td><td>N/A</td></tr><tr><td>8</td><td>March 20, 2026</td><td>2.9% (19th)</td><td>2.8% (16th)</td></tr><tr><td>9</td><td>March 21, 2026</td><td>2.3% (23rd)</td><td>N/A</td></tr><tr><td>10</td><td>March 27, 2026</td><td>2.6% (19th)</td><td>2.1% (19th)</td></tr><tr><td>11</td><td>March 28, 2026</td><td>2.5% (20th)</td><td>N/A</td></tr><tr><td>12</td><td>April 3, 2026</td><td></td><td></td></tr><tr><td>Average</td><td>—</td><td>—</td></tr></tbody></table>