In Your Radiant SeasonSeason 12026 · 12 episodesEpisodes1Episode 1Seven years after a lab explosion, Chan returns home for work and unexpectedly meets Haran again.2Episode 2Chan sees that Haran is frozen in winter and suggests a three-month trial friendship.3Episode 3Haran rejects Chan's three-month friendship offer, but Chan is undeterred.4Episode 4As Chan and Haran grow closer, a mysterious sound begins to haunt him, revealing gaps in his memory.5Episode 5Chan 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.6Episode 6Chan'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.7Episode 7Chan and Ha-ran reunite after his U.S. return. At a SHIM party, their bond grows while Chan starts recording his resurfacing memories.8Episode 8Ha-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.9Episode 9Chan'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.10Episode 10Chan'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.11Episode 11Ha-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.12Episode 12
