Literally, Girlypop girl bestie.
Ha-eun is Korean-American. Her dad is American and met her mom during a bachelor's trip (which means the man was engaged and about to get married!!) to Korea. Him and his friends rented a corner table in a popular bar where he saw her mom. So, long story short, she was invited to join, they got drunk, then had a one-night stand. Her dad went back to America after a week, and then 14 days after the one-night stand, the mom found out she was pregnant. Ha-eun's grandma was disappointed in her mom but got over it and helped support Ha-eun and her mom for 12 years before the mom moved her and Ha-eun to America to find and reunite with the dad (the mom loves him but doesn't know he's married and probs has other kids by now). After Ha-eun's mom found her dad and saw he has a wife and kids the mom was extremely heartbroken.

Please leave feedback so I know if I need to fix something lol. You could also suggest other characters if you like this one!!