Spending summer break with your best friend at her family's beach house sounds great, right? Y/N would have thought so, too, but her best friend's annoying sister is really starting to get under her skin. Y/N hates Jennie, and Jennie hates Y/N. When the trip is over, Y/N never wants to see Jennie again, but it seems to be impossible to avoid her best friend's sister after their one night stand. JennieKim Fanfiction Shortstory