Lee Ji-hwan gets photographs in the mail that reminds him of just how he met 2 women, Shim Su-in as well as Kim Gyeong-heui, one summer season 5 years ago. He shares his memories with his close friend Cheol-hyeon. He remembers at first being in love with Su-in, yet she declines him. Throughout the summertime, the 3 remain buddies. Ji-hwan and Gyeong-heui create feelings for each and every other however are reluctant to confess. Ji-hwan recalls the complicated connection between the three to Cheol-hyeon.