"Kekkon Shinai" follows the lives of single people in their 30's and 40's.
Chiharu Tanaka (Miho Kanno) is a single woman about to turn 35-years-old. She sees her friends getting married and giving birth. Watching them, she becomes restless, but she can't get married.
Haruko Kirishima (Yuki Amami) is a 44-year-old single woman.She is philosophical about marriage, giving birth, and dating. She doesn't marry.
Junpei Kudo (Hiroshi Tamaki) is a single man who can't afford to get married.