Lee Ji-hwan (Cha Tae-hyun) receives photographs in the mail that reminds him of how he met two girls, Shim Su-in (Son Ye-jin) and Kim Gyeong-heui (Lee Eun-ju), one summer five years ago. He shares his memories with his friend Cheol-hyeon (Park Young-woo). He recalls initially being in love with Su-in, but she rejects him. Throughout the summer, the three remain friends. Ji-hwan and Gyeong-heui develop feelings for each other but are reluctant to admit it. Ji-hwan recalls the complex relationship between the three to Cheol-hyeon.
Moon Geun-young | Ji-yoon | |
Cha Tae-hyun | Lee Ji-hwan | |
Lee Eun-ju | Kim Gyung-hee | |
Kwak Jung-wook | Ji-Hwan (child) | |
Son Ye-Jin | Shim Soo-in |
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