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

• Jung In-sun
• Choi Si-won
• Lee Tae-hwan
• Jung Yoo-jin
• Lee Si-hoon
• Lee Soo-bin
• Bang Eun-jeong
• Lee Chul-woo