Season 1 (2026)
Episodes: 12
Star Cast: Lee Sung-kyung , Chae Jong-hyeop , Han Ji-hyeon , Kwon Hyuk ,
Episodes List
Ep.1 Episode 1
Air Date: 2026-02-20
Seven years after a lab explosion, Chan returns home for work and unexpectedly meets Haran again.
Ep.2 Episode 2
Air Date: 2026-02-21
Chan sees that Haran is frozen in winter and suggests a three-month trial friendship.
Ep.3 Episode 3
Air Date: 2026-02-27
Haran rejects Chan's three-month friendship offer, but Chan is undeterred.
Ep.4 Episode 4
Air Date: 2026-02-28
As Chan and Haran grow closer, a mysterious sound begins to haunt him, revealing gaps in his memory.
Ep.5 Episode 5
Air Date: 2026-03-06
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.
Ep.6 Episode 6
Air Date: 2026-03-13
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.
Ep.7 Episode 7
Air Date: 2026-03-14
Chan and Ha-ran reunite after his U.S. return. At a SHIM party, their bond grows while Chan starts recording his resurfacing memories.
Ep.8 Episode 8
Air Date: 2026-03-20
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.
Ep.9 Episode 9
Air Date: 2026-03-21
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.
Ep.10 Episode 10
Air Date: 2026-03-27
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.
Ep.11 Episode 11
Air Date: 2026-03-28
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.
