Lee Ji-hwan obtains photos in the mail that advises him of exactly how he fulfilled two ladies, Shim Su-in and also Kim Gyeong-heui, one summer season five years back. He shares his memories with his good friend Cheol-hyeon. He recalls originally being in love with Su-in, but she denies him. Throughout the summer season, the 3 continue to be pals. Ji-hwan and Gyeong-heui develop feelings for every other but are reluctant to confess. Ji-hwan recalls the complex relationship in between the three to Cheol-hyeon.