Anh Sohee and Kim Minseok are twins. They have different last names because they were adopted by different families. Their parents died in a car accident when they were 5 and were sent to an orphanage. At age 10, Minseok was adopted by a lovely couple, but not Sohee. The couple did not want Sohee, only Minseok. After 6-8years, Sohee is finally able to live on her own. She buys a house and goes to school at Seoul High School. As she attends there, she meets her brother. This is a story about the twins and the lives they will go through. There will be laughter, love, and tragedy.