Unchained Fondness

Nat (Kim Ji-Won) is a "close-to-perfect girl" who's set to have a peaceful happy life on her own and soon-to-be a cardiothoracic surgeon. Her world, however, suddenly turns upside down when she met a total stranger, the easy-going Niall (Park Seo-Joon). As she figures out with Niall why their destiny always find a way for them to encounter each other, Nat starts violating her own rules to persist their crazily unclear condition. But the changes in her well-planned life appear to cause a change of heart as well. Will they end up together or will they just break each other's hearts?