After Yoon Bomi's parents pass away in a car accident, she's placed in the care of her older brother. Unfortunately, he's gone haywire and isn't exactly fit to be a guardian. Enter Kim Songjae and Lee Siyoung. They were Bomi's parents best friends and have an offer for her. It was an unspoken promise to look after her and put her at ease, and so, they offer their son's hand in marriage.  Both at seventeen years old, Kim Seokjin and Yoon Bomi are now married.