Jung Dae Eun is a regular student who just moved back to Seoul after 14 years in Norway. She starts at Seoul High School and quickly become friends with her new classmates, Soo Min Ah and Kim Jae Suk. They later become bestfriends and they often hang out at the local diner owned by the father of Jae Suk, Kim Seong Su.
​Later at school, Dae Eun encounter the tall and handsome senior, Lee Taeyong. At first glance, she falls head over heels for him and become speechless, until he opens his mouth and starts to talk. She instantly loses her interest in him and begins to despise his behavior. Although she tries to avoid them, she often finds herself implicated with the four boys.
​What is Dae Eun going to do now? What is this strange feeling she feels everytime she's around Taeyong? Why do they always end up in the same mess together? Who is the new teacher and why does Dae Eun get goosebumps everytime their eyes meet?