Seungri High School is an elite school in Seoul, own by one of the richest family in South Korea, the great Choi family. The Choi family has a company to their name, Choi Holdings, and runs a business involving constructions and has built many established buildings in the world. Choi Holdings has been passed down to many generations. Usually the Choi family will only have one child, so that the child will eventually take over the company when the child has come to age.

Only students whose family are in the upper class income category can attend such an elite school largely due to the expensive school fees.

The last descendant of the Choi family, Choi Minho, is currently a student in Seungri High School. He is quite arrogant, despite that, the girls in school are always trying to throw themselves to him. He is the captain of the school's soccer team. He has a group of friends whom he clearly adore, Jonghyun, Kibum, Jinki and Taemin. 

Choi Sulli, Minho's classmate. The only daughter of owner of Shawol Hotel. Shawol Hotel has many hotels all around the world. Sulli will be taking over her father's hotel chains after she has graduated. Has a group of friends, they are practically there with her since day 1 in kindergarten. They are Krystal, Luna, Victoria and Amber. 

It was their last semester in school. They had to do one project together in order to graduate. The teacher would be pairing the students up, which ended up Sulli and Minho being paired up. Minho and Sulli never really spoke to each other in school before and Sulli hated his personality which she noticed while working on the project with him. Minho on the other hand hated the way she do things. He will always have to follow HER schedule and felt like Sulli was too big headed.

Will they ever work together on the project without any arguments?

As they spend more and more time together doing the project, will they eventually become friends? Or maybe more than friends?