Lee Haera comes to terms with the fact that she won't live past eighteen due to some sort of heart disease. Because of that heart disease, she's spent most of her sixteen years of life living in the hospital.  Right on the eve of her seventeenth birthday, a boy roughly her age gets admitted into the same room as her. Now, the bed beside her won't be empty anymore. Not since Oh Sehun took it. They began to share a mutual friendship over their problems. Hers being her heart, and