Drama Family Mystery
S01E01 • 8.2/10 • 69m • 20 Feb 2026 • KR •

In Your Radiant Season (2026) S01E01 – Episode 1

Seven years after a lab explosion, Chan returns home for work and unexpectedly meets Haran again.

Cast

Lee Sung-kyung
Lee Sung-kyung
Song Ha-ran
Chae Jong-hyeop
Chae Jong-hyeop
Sunwoo Chan
Han Ji-hyeon
Han Ji-hyeon
Song Ha-yeong
Kwon Hyuk
Kwon Hyuk
Yeon Tae-seok
Oh Ye-ju
Oh Ye-ju
Song Ha-dam
Kim Tae-Young
Kim Tae-Young
Cha Yu-gyeom
Lee Mi-sook
Lee Mi-sook
Kim Na-na
Kang Seok-woo
Kang Seok-woo
Park Man-jae
Jung Hae-kyun
Jung Hae-kyun
Sunwoo Seok
Kang Ae-sim
Kang Ae-sim
Kim Seon
Ki Hyun-woo
Ki Hyun-woo
Baek Seung-gyu
Lee Seung-yeon
Lee Seung-yeon
Jeon Pu-reum
Yun Chae-bin
Yun Chae-bin
Kim Sol
Yoon Park
Yoon Park
Yoon Photo
Han Jae-yi
Han Jae-yi
Eun-chan
Park Seong-hyeon
Park Seong-hyeon
Sunwoo Chan (Young)
So I-han
So I-han
Kim Seok-hyeon

Episodes

In Your Radiant Season (2026) S01E01 – Episode 1 S01E01 69m
20 Feb 26
In Your Radiant Season (2026) S01E01 – Episode 1
Seven years after a lab explosion, Chan returns home for work and unexpectedly meets Haran again.
In Your Radiant Season (2026) S01E02 – Episode 2 S01E02 67m
21 Feb 26
In Your Radiant Season (2026) S01E02 – Episode 2
Chan sees that Haran is frozen in winter and suggests a three-month trial friendship.
In Your Radiant Season (2026) S01E03 – Episode 3 S01E03 67m
27 Feb 26
In Your Radiant Season (2026) S01E03 – Episode 3
Haran rejects Chan's three-month friendship offer, but Chan is undeterred.
In Your Radiant Season (2026) S01E04 – Episode 4 S01E04 68m
28 Feb 26
In Your Radiant Season (2026) S01E04 – Episode 4
As Chan and Haran grow closer, a mysterious sound begins to haunt him, revealing gaps in his memory.
In Your Radiant Season (2026) S01E05 – Episode 5 S01E05 72m
6 Mar 26
In Your Radiant Season (2026) S01E05 – Episode 5
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.
In Your Radiant Season (2026) S01E06 – Episode 6 S01E06 68m
13 Mar 26
In Your Radiant Season (2026) S01E06 – Episode 6
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.
In Your Radiant Season (2026) S01E07 – Episode 7 S01E07 72m
14 Mar 26
In Your Radiant Season (2026) S01E07 – Episode 7
Chan and Ha-ran reunite after his U.S. return. At a SHIM party, their bond grows while Chan starts recording his resurfacing memories.
In Your Radiant Season (2026) S01E08 – Episode 8 S01E08 65m
20 Mar 26
In Your Radiant Season (2026) S01E08 – Episode 8
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.
In Your Radiant Season (2026) S01E09 – Episode 9 S01E09 68m
21 Mar 26
In Your Radiant Season (2026) S01E09 – Episode 9
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.
In Your Radiant Season (2026) S01E10 – Episode 10 S01E10 65m
27 Mar 26
In Your Radiant Season (2026) S01E10 – Episode 10
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.
In Your Radiant Season (2026) S01E11 – Episode 11 S01E11 67m
28 Mar 26
In Your Radiant Season (2026) S01E11 – Episode 11
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.
In Your Radiant Season (2026) S01E12 – Episode 12 S01E12 71m
3 Apr 26
In Your Radiant Season (2026) S01E12 – Episode 12

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