1Episodio 1
Hace 7 años, la vida de Chan cambió. Al volver a casa, se topa con Haran.
2Episodio 2
Tras 7 años, Chan ve a Haran. Le propone ser amigos durante tres meses.
3Episodio 3
Haran rejects Chan's three-month friendship offer, but Chan is undeterred.
4Episodio 4
As Chan and Haran grow closer, a mysterious sound begins to haunt him, revealing gaps in his memory.
5Episodio 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.
6Episodio 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.
7Episodio 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.
8Episodio 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.
9Episodio 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.
10Episodio 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.
11Episodio 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.
12Episodio 12
After their trial ends, Haran learns the truth. Chan has vanished, but discovering his feelings, she goes to find him.