Hyun Ji-seok, a university professor, and Go Mi-yeon, a scriptwriter, were high school sweethearts, who discover that they are cousins. They break up, but find themselves attracted to one other once again when they meet in Seoul four years later.

• Kang Ji-hwan
• Kim Ha-neul
• Jeong Hye-young
• Yoon Hee-seok
• Kim Hyeong-beom
• Yoon Hyeon-sook
• Kim Hye-ok
• Lee Jae-yong