Min Yoongi is one of the smartest student in the class, but he is as cold as ice. All he cares about is himself and his success. On the other hand,Park Mi-Na is a active, joyful and outgoing girl. Even though she's been through so much obstacle in life, she is able to stay strong and powerful. One day Yoongi and Mi-Na is assign to do a project together. At first the two did not get along, but as time went by they created a good friendship bond that later turned into an interest in one another, but due to Yoongi cold heart, it did last long. Mi-Na transfer to a new school and the two never met again. Yoongi regret what he has done to Mi-Na and wished for her to come back. As times go on, people move on and when the two meets again would Yoongi confess to Mi-na.
"But then I met him and now he is the lifeline that keeps me from drowning."
Hwang Sun-Hi has been a trainee for a few years now for Big Hit Entertainment. Her debut date is finally here, but just like all the times before, her social anxiety keeps sabotaging her. She doesn't want to look weak, not in front of the company, not in front of her girls and especially not in front of the outside world.
When she bumps into Min Yoongi after a brutal day of training, she lets it all out and spills everything that she had kept bottled up inside for so long. Instead of showing her the door, as she had expected, Yoongi offers her some comfort and kind words.
Sun-Hi and Yoongi grow closer and closer together as time goes on but have to hide their friendship from everyone in order to keep up both their reputations.