Ji Sung as Dr Cha Yo Han
A professor in gynecology department. Very handsome and kind. Extremely genius as well. You will fall in love with his charm. Also called dr 10 seconds as he takes only 10 secs to identify any illness.
Kim Ji Won as Si tu mo
A first year resident at HANS medical center. Very cute, Kind, beautiful, intelligent and childish. Behaves like a 7 years old. A gynecologist. Gets emotionally attached to her patient. Also called Momo.
Lee Min Ho as Dr Namjoon
Bff of Dr cha yo han. Same field. Handsome, kind, intelligent. Love Xiaoxi and a really ideal type.
Song Hye Kyo as Xiaoxi.
Best friend of si tu mo. Only she in the world can control her. Most beautiful female doctor in the whole hospital. Mature, kind, beauiful and innocent.
others
Ms Gui- Mom of Si tu mo
mr an miss Chen- Parents of Xiaoxi
Hobi, jennie, jisoo, wu bosong, lee yu joon, min- other residents, professors, fellows.