Sana was a pretty or hot girl in JYP Entertaiment. Mark was in America and he didn't know anything about Sana though he 3 years in JYP..and Sana a new group debut in JYP..When back to Korea, he started to captivate Sana..but, Sana already has a boyfriend fom BTS group..he was Jungkook..LeTs ReAd!!