A high school student's first love and friendships are explored in this story. The protagonist, Bo-Ra, is a 17-year-old taekwondo expert with a bright personality, who is part of her school's broadcasting club. She's best friends with Yeon-Du, who harbors a secret crush on Hyun-Jin. When Yeon-Du leaves for the US to undergo heart surgery, Bo-Ra takes it upon herself to learn more about Hyun-Jin, and ultimately finds herself falling for him.

20th Century Girl
A teenager's life becomes entangled in a web of obsession and unexpected consequences when their best friend's secret crush on a popular classmate is revealed.