Bok Joo is a college student and a weightlifting player. She deeply loves her father, who is sick but sells fried chicken to support her. She can't stand injustice and values loyalty. She has never had a chance to go on a blind date as she is a weightlifting player, but she accepts it as her life. Jun Hyung is a swimmer who goes to the same college as Bok Joo. They used to know each other when they were kids. He constantly teases her, so she resents him. Jun Hyung has a cousin, Jae Yi. He is kind to everyone, so it sometimes causes misunderstanding, making some women feel led on. One day, Bok Joo runs into Jae Yi and falls for him after seeing him smile at her. She finds out he is a doctor at an obesity clinic and signs up for the weight-loss program at the clinic. However, Jun Hyung finds out about this, and he can't pass up the opportunity to tease her.