"I hate growing up. But I guess I have to deal with it." ~ Kim Taeyeon and her brother, Kyungsoo always go to the Byun's beach house every summer due to their parents who are away for work. Mrs. Byun has two sons, Baekhyun and Joongki. They met Taeyeon and Kyungsoo 6 years ago. And they treated her like a sister. But this year is different. This year everything will change. Love grew, Their bond became stronger, Family issues were to be solved, And secrets have been shared. This story is inspired by the book "The Summer I Turned Pretty" (Please do not plagiarize)