A story about a woman who's slowly losing her memory and a man who takes responsibility for loving her.

Two strangers meet, fall in love and get married. After they have settled into married life, however, they face numerous marriage problems. Couples start to wonder why they even get married at the first place and think about divorce lamenting “I didn’t get married to live like this!’ But, shortly, you think of your parents who have managed to save their marriage for 40, 50 years. Why are the marital relationships of young generation more likely to break down easily? Are we too smart? Are we impatient? Or is it the way it should be in modern society? Tons of married couples visit family courts to break their vows, while numerous young people go on a date to find Mr. Right. . People do divorce at a huge rate nowadays and some think marriage is dead. However, lots of people still get married because they believe in this traditional institution. In this drama, high school vice president Kim and his 4 children struggle to resolve their marriage problems and towards the end they learn how to save their marriage.

This drama tells the story of a woman who devoted her life to love and a man who had never known nor believed in love. Jang Soo Hyun was a woman who previously believed in sacrificing herself for love, even donating her liver to save her first love, Choi Min Young, but was rewarded by betrayal when her best friend, Oh Sun Ah, seduced Min Young. Since then, she had become jaded and resolved to distance herself from relationships, until she met Han Tae Woo, a man who had built a wall around his heart in fear of being hurt again. She becomes someone whom he learns to sacrifice everything for.

Yoo Min Soo (Shim Hyung Tak) is the eldest son of a hospital’s CEO. His wife, Jang Mi Ryung (Jo Yeo Jung), bore a child out of wedlock but raises it with maternal love. Source News

The drama is about love of singles in their 30s. Hong Nan Hee is an ordinary worker at a publishing firm, she's a girl who always falls in and out of love since she was young until one day when she meets an old classmate, Byun Hyung Tae, who is a team leader of an advertising company again. Hyung Tae may seem to be a good catch in the eyes of many women but he's only a cowardly boy to Nan Hee whom he has grown up with. '9 End 2 Outs' is using the baseball theme to compare to the fates and lives of the people in love.