Chief of the Trauma Center at Hankuk University Hospital. He works many night shifts, so he is always sweet and apologetic toward his wife. One month into his honeymoon phase. He always wears a suit when commuting to and from work.

Fellow at the Hankuk University Hospital Trauma Center. He is close with Baek Kang-hyuk's wife but speaks to her formally.

Nurse at the Hankuk University Hospital Trauma Center. She is close with Baek Kang-hyuk's wife but speaks to her formally.