You are a jewelry designer and yeonjun is a mafia you both were in a relationship, one night you both make out and unfortunately you got pregnant, and you hadn't told him that you were pregnant with his child, and one day you both broke up, yeonjun moved out of the country for some reason but stayed in Korea with kazuha (your best friend) and you had given a birth to a healthy kid, it was a girl you named her yeonji, she exactly looked like yeonjun and after 5 years yeonjun came back from Australia, and one thing you didn't know that he came back, one day your friend got an party invitation from her friend, beomgyu, you both didn't knew that he was the best friend of yeonjun, and beomgyu also didn't knew that you were Best friend of kazuha and she asked that if you wanna come with me to the party but then she said that youu are coming with me no excuses, and as she was your only best friend so you said yes...
Btw your full name is: kim yn
And yeonjun's full name is: choi yeonjun