Kim Minjeong is just an ordinary 20-year-old girl, always studying diligently to meet her parents' expectations, but she also runs into obstacles along the way. Her bully, Yu Jimin, is the most popular girl in school, known for picking on nerds. Minjeong has now caught her attention and become her new target - but what Minjeong didn't expect was that, day by day, she would start wanting Jimin to bully her, just to get her attention.

Minjeong's ex-boyfriend is getting married, and she'd rather swallow glass than show up alone. Enter Yu Jimin: her brother's best friend and the woman who has been teasing Minjeong since she was ten years old. Jimin agrees to be her fake girlfriend for the weekend, but she has conditions. There's a lot of hand-holding, way too much "baby-ing" in front of the guests, and they're forced to share a bed at the hotel. It was supposed to be a performance, so why is Minjeong's heart doing backflips every time Jimin looks at her?