That Summer  

Geu Hae Yeoreum, 그 해 여름

Kim Jumi's life is similar to that of any other high school student preparing for college entrance exams in that it involves a lot of hard work and little time for leisure activities. However, one summer day, while observing two classmates from her cram school, she witnessed them sharing a passionate kiss on the rooftop of their cram school. This event marked the beginning of Kim Jumi's involvement with Kang Heebum and Choi Yuwon, who had a complex romantic relationship.