Jung Yeol and Na Ra fell in love with each other and got married. During their marriage, they have grown to hate each other due to their personality differences. They decide to get a divorce. A month later, their divorce will be finalized. But, on the day that they applied for a divorce, they get into a car accident. When they wake up at the hospital, they have both lost their memories and do not remember each other.
Both movies center two high school students using an "exchange diary" (koukan nikki) and begin with the protagonists having an unrequited love towards their somewhat cold love interest, though the genders are reversed. Both movies also feature some kind of love triangle. The way each movie plays out and ends is quite different, but they both give a similar fluffy, heart-warming feeling. If you enjoyed one you will certainly like the other.
