Yoo Jeongyeon is the CEO of the biggest toy company in her country. She lives alone with her halmeoni in her huge house because her parents live in the States. She is fierce, smart and, empowered. But behind the strong façade is a weak heart. Because of a weak heart she undergone a heart transplant. To make sure that she will be guided, her parents hired the best nurse as her personal assistant. She didn't want Jimin as her assistant because first and for most he is a male and her personal nurse is required to stay in their house with her. But she can't do anything bu oft to agree. Jimin would always be there wherever she is whether she likes it or not. Jimin being a cheerful happy person would do his best to at least make his patient smile because she never wears a smile. And a smile is the greatest medicine. Will the nurse successfully bring a smile to her face? Or will he just give her teardrops to cry? Highest Ranking Jeongmin - #1 out of 527 Health - #17 out of 33.7K Complicated - #65 out of 10.9K Bangtwice - #35 out of 3.16K

What will you do if the person whom you loved the most is the same person who ruined the life you had? How far your love can do? Would you forget everything for his/her sake? Are you willing to love the same person who caused you pain?