In 1945, upper class and middle class families were being respected to any rank and status of people in Korea. Especially the lower class people. Jaemin was the son of the upper class of a business family. He studied medicine in Japan and went back to Korea after that. He was known for his kindness, friendly, but cold, mysterious, tsundere, fierce, intelligent, and competitive. But, what if he fell in love with a young lower class woman?