Characters

• 

  Lee Ganghun (CAST: Shin Hakyun)

  Rise from humble family, Lee Ganghun.
  
  Lee Ganghun is a full time neurosurgeon in his early 30s. He graduated from Korea's most prestigious medical school and completed his residency with the best grades at the same school. He chose to be a surgeon not to save sick patients, but because surgeons are still one of the decent jobs in Korea. Also, his father passed away because a hospital refused to treat him when he was in a critical situation. He chose neurosurgery, the least popular department, because there he can easily gain privileges by making connections with senior doctors. Years of effort and study, he becomes a disciple of Mr. Ko Jaehak who is the main power in the hospital and waits for appointment as the youngest assistant professor sooner or later.
  Rise from humble family, Lee Ganghun.
  
  Lee Ganghun is a full time neurosurgeon in his early 30s. He graduated from Korea's most prestigious medical school and completed his residency with the best grades at the same school. He chose to be a surgeon not to save sick patients, but because surgeons are still one of the decent jobs in Korea. Also, his father passed away because a hospital refused to treat him when he was in a critical situation. He chose neurosurgery, the least popular department, because there he can easily gain privileges by making connections with senior doctors. Years of effort and study, he becomes a disciple of Mr. Ko Jaehak who is the main power in the hospital and waits for appointment as the youngest assistant professor sooner or later.
• 

  Kim Sangcheol (CAST: Jung Jinyoung)

  A genius neurosurgeon and a geek, Kim Sangcheol.
  
  A professional neurosurgeon who mastered neurology, neurosurgery and neuroscience. Kim Sangcheol has much pride in himself and his study, neurosurgery. He is known as an unexpectable geek who is so temperamental to his students and other medical staff, but he is as gentle as a lamb with his patients.
  A genius neurosurgeon and a geek, Kim Sangcheol.
  
  A professional neurosurgeon who mastered neurology, neurosurgery and neuroscience. Kim Sangcheol has much pride in himself and his study, neurosurgery. He is known as an unexpectable geek who is so temperamental to his students and other medical staff, but he is as gentle as a lamb with his patients.
• 

  Yoon Jihye (CAST: Choi Jungwon)

  The eldest daughter from an ordinary family. Yoon Jihye.
  
  Yoon Jihye has been a cat-and-dog with Lee Kanghun from the beginning. She hates him who looks down on her because she is a woman from another medical school. However, the truth is, she has feelings for Kanghun. She feels distressed because she does not know how to control her feelings for him.
  The eldest daughter from an ordinary family. Yoon Jihye.
  
  Yoon Jihye has been a cat-and-dog with Lee Kanghun from the beginning. She hates him who looks down on her because she is a woman from another medical school. However, the truth is, she has feelings for Kanghun. She feels distressed because she does not know how to control her feelings for him.
• 

  Seo Junseok (CAST: Jo Donghyuk)

  To be born with everything, Seo Junseok.
  
  Seo Junseok attracts attention wherever he goes with his good looks and well-mannered behaviour. Judging from his appearance, he looks like a considerate and good-natured man, but he is very competitive and hate losing, so he and Kanghun has been a rival since medical school days. Junseok cannot even imagine losing anything because he was born with everything from a privileged family. He thinks there is a certain limit that underprivileged cannot cross. Therefore, Junseok despises Kanghun and his challenge and cannot forgive him who took Yoon Jihye’s heart.
  To be born with everything, Seo Junseok.
  
  Seo Junseok attracts attention wherever he goes with his good looks and well-mannered behaviour. Judging from his appearance, he looks like a considerate and good-natured man, but he is very competitive and hate losing, so he and Kanghun has been a rival since medical school days. Junseok cannot even imagine losing anything because he was born with everything from a privileged family. He thinks there is a certain limit that underprivileged cannot cross. Therefore, Junseok despises Kanghun and his challenge and cannot forgive him who took Yoon Jihye’s heart.