Seungwan and Joohyun were couples since highschool, they shared lots of memories together as if everyone knew that they will end up together and make a family together... But what if everything will suddenly change?? Seungwan is a Law student as Joohyun is a medical student.. Joohyun's parents were against Seungwan since they already want someone for their daughter, but how could Joohyun possibly teach her heart who to love right? When it's only beating for Seungwan..