#1 Episode 1
Seven years after a lab explosion, Chan returns home for work and unexpectedly meets Haran again.
Release: 2026-02-20Grade
#2 Episode 2
Chan sees that Haran is frozen in winter and suggests a three-month trial friendship.
Release: 2026-02-21Grade
#3 Episode 3
Haran rejects Chan's three-month friendship offer, but Chan is undeterred.
Release: 2026-02-27Grade
#4 Episode 4
As Chan and Haran grow closer, a mysterious sound begins to haunt him, revealing gaps in his memory.
Release: 2026-02-28Grade
#5 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.
Release: 2026-03-06Grade
#6 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.
Release: 2026-03-13Grade
#7 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.
Release: 2026-03-14Grade
#8 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.
Release: 2026-03-20Grade
#9 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.
Release: 2026-03-21Grade
#10 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.
Release: 2026-03-27Grade
#11 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.
Release: 2026-03-28Grade