Park Bom its Kwon Jiyong niece. But they have a same age. She always call Jiyong "Ahjussi" just for , because Bom its like to since they were young. Park Bom its a dance and music teacher at YG Studio. And Jiyong its a specialist doctor at him father hospital. Jiyong its so care and love Bom so much since they were young. They always together until he come and replace Jiyong from her life.

Kwon Jiyong its a specialist doctor. He want to be a doctor since he was little because of Park Bom. Park Bom always when he's little that he can't be a doctor because Jiyong can't be nice to people, so he being a doctor just to show her that he can be nice. But now he know that god not ask him to be a doctor just that, there's an assigment for him.

Choi Seunghyun its a specialist doctor from Jiyong father hospital too. He is a very nice and kind, he is the most handsome doctor in that hospital. He likes to biking in weekend and he like to climb a mountain. He's older than Jiyong and Park Bom.