Why can't Shan Yu Paula get married?

Sunwoo Paula can't get married because they are both surnamed Cheng. 1988 in Korea, there is a law that the same surname is not allowed to get married. After they fell in love, they were also worried in all aspects. Therefore, they broke up. Fortunately, they finally reconciled and finally entered the marriage hall. Sunwoo and Paula have a good ending.

In Please Go Back to 1988, Cheng Baola is Deshan's sister, very free and easy, and very capable. She was 2 1 year-old. She is a sophomore at National Seoul National University, and she has done well in her studies since she was a child. Cheng is a sophomore in Shuangmen High School, aged 18, with good academic performance, handsome appearance and gentle personality. He is a gentleman.

Sun-woo's love for Paula began when she was very young, and she didn't confess it until high school. Although they are brothers and sisters, their love has always been very good, but because of the same surname, they have always had an underground love affair until they grow up and work, and their policies are rectified.