Seasons & episodes

S1 · E1Episode 1 2026-02-20 · 69 min＋

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

S1 · E2Episode 2 2026-02-21 · 67 min＋

Chan sees that Haran is frozen in winter and suggests a three-month trial friendship.

S1 · E3Episode 3 2026-02-27 · 67 min＋

Haran rejects Chan's three-month friendship offer, but Chan is undeterred.

S1 · E4Episode 4 2026-02-28 · 68 min＋

As Chan and Haran grow closer, a mysterious sound begins to haunt him, revealing gaps in his memory.

S1 · E5Episode 5 2026-03-06 · 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.

S1 · E6Episode 6 2026-03-13 · 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.

S1 · E7Episode 7 2026-03-14 · 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.

S1 · E8Episode 8 2026-03-20 · 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.

S1 · E9Episode 9 2026-03-21 · 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.

S1 · E10Episode 10 2026-03-27 · 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.

S1 · E11Episode 11 2026-03-28 · 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.

S1 · E12Episode 12 2026-04-03 · 71 min＋

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