Suzy knows a lot about weddings, but not so much about love. Working during the summer at her mom's wedding planning business, Suzy has seen every kind of weddings, from informal on the beach to elegant in mansions. She's handled all kinds of chaos: runaway brides, scene-stealing bride maids, controlling grooms. And she's seen the eventual outcome of each perfect wedding. Maybe that's why she's deeply skeptical about happily-ever-after endings, especially since her own perfect first love ended sadly. So when handsome, happy serial player Sehun enters her life, Suzy won't take him seriously. He believed that he can change. Suzy is betting that he can't. But Sehun hates not getting what he wants, and Suzy is the girl he's always been waiting for.