19-year-old Sujeong had a busy life filling the gap of her late mother. She met her first love 'Black Dragon.' However, her romantic ended up becoming the most embarrassing moment in her life.

Sujeong tries to make up for her relationship with Juyeon, but to Juyeon who has a secret life, Sujeong is just an eyesore. The tables are turned when Juyeon's secret life is busted by Sujeong.

With Juyeon in the lead, Yongsung Department Store is having a large-scale renewal project. Juyeon and Sujeong become closer as they work together. Then Juyeon becomes highly disappointed in Sujeong.