So Jin, a genetic researcher who loves DNA, decides to end her relationship with her playboy boyfriend and sets out to find a genetically compatible partner for a happy relationship. Which of the two men Soo Jin knows, obstetrician-gynecologist Yeon Woo and firefighter Kang Hoon, will be the perfect match for her? A captivating story intertwined with genetics! This story depicts the struggles, love, and daily life of young friends.