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In a sea village, there is a high school freshman, Da-young, who broke up with her boyfriend after summer vacation. Da-young, who has to write the most memorable thing for her vacation homework, writes down the lies of that summer day, recalling her memories with her ex-boyfriend, Byung-hoon.
The runaway high school students, Hyeon-su and Dong-gyu, are helped by Min-jung who is a member of the so called runaway family. Hyeon-su asks to go to a runaway family’s residence, but Dong-gyu opposes it, and Hyeon-su and Dong-gyu feel for each other as they depend on one another. Dong-gyu frankly confesses to Hyeon-su, but Hyeon-su denies his feelings and leaves Dong-gyu to head for the home of runaway family by himself.
