Elaina, Sooyeon, and Taeyang had been best friends since high school. They did everything together, from studying late nights for exams to going on adventures during summer break. But what most people didn't know was that Elaina and Taeyang had been best friends since middle school. They had a special bond that went beyond friendship, but they never acted upon it. One day, Taeyang surprised Sooyeon by proposing to her in front of their families and Elaina. Then Elaina finds out she's pregnant.