Park Chae Soo is a senior student at Seoul Academy, and she comes from a well-known family, because her mother owns the most popular cupcake shop in Seoul. 

 

You could say her life was the best when she started high school, because she was one of the top students, teachers adored her, and she barely got scolded, or into trouble. 

 

But, ever since she met this guy, named Yeo Hoon Min, her life has literally been a living hell. 

 

What happens when her childhood friend, who is also Hoon's good friend, comes back to Seoul after 7 years?