In Your Radiant Season — Season 1
Some seasons change you forever.
About this season
Chan lives every day like it is summer vacation. Haran is trapped in a lonely winter. When their forgotten past reunites them, Chan is determined to gift her another spring. Through laughter and tears, they face winter together and reach their spring in this heartwarming romance.
Episodes (12)
1. Episode 1
10.0Aired 20 February 2026 • 69 min
Seven years after a lab explosion, Chan returns home for work and unexpectedly meets Haran again.
2. Episode 2
10.0Aired 21 February 2026 • 67 min
Chan sees that Haran is frozen in winter and suggests a three-month trial friendship.
3. Episode 3
10.0Aired 27 February 2026 • 67 min
Haran rejects Chan's three-month friendship offer, but Chan is undeterred.
4. Episode 4
10.0Aired 28 February 2026 • 68 min
As Chan and Haran grow closer, a mysterious sound begins to haunt him, revealing gaps in his memory.
5. Episode 5
8.0Aired 6 March 2026 • 72 min
Chan and Ha-ran find a Gyeongju escape but a resurfacing memory puts Chan in a brewing storm. Unbeknownst to Ha-ran, Chan is drawn into a brewing storm.
6. Episode 6
10.0Aired 13 March 2026 • 68 min
Chan's sudden exit for the U.S. leaves Ha-ran reeling. As longing sets in, the three sisters clash and Na-na faces an unexpected incident.
7. Episode 7
10.0Aired 14 March 2026 • 72 min
Chan and Ha-ran reunite after his U.S. return. At a SHIM party, their bond grows while Chan starts recording his resurfacing memories.
8. Episode 8
10.0Aired 20 March 2026 • 65 min
Ha-ran helps Chan reveal his father's watch secret. After their reconciliation, Ha-ran wins an award but meets a shocking face at the ceremony.
9. Episode 9
10.0Aired 21 March 2026 • 68 min
Chan's unintentional lie about the fountain pen weighs on his conscience. To stay close to Ha-ran, he must decide if the truth is worth the risk.
10. Episode 10
10.0Aired 27 March 2026 • 65 min
Chan's envy of Su-jin and Ha-ran grows. As Ha-ran celebrates Chan’s birthday, she moves past her "winter" while Nana makes a choice in Chuncheon.
11. Episode 11
10.0Aired 28 March 2026 • 67 min
Ha-ran, who learns Chan's secret from seven years ago through the "1-Inch of Memory" notebook, falls into confusion upon realizing that even the fountain pen was a gift he had prepared.
12. Episode 12
10.0Aired 3 April 2026 • 71 min