Choi Yeonjun is your boyfriend, but he's losing time for you because he's too busy with his studies. He decided to break up with you, and he told you that he would fulfil his dream and promised that he would come back to you 5 years later. You buried that promise in your heart and waited for him for 5 years

It's been 5 years, and he really did came back, but he said something that broke your heart. "I'm getting married, and I want you to be one of the bridesmaids in my wedding"