Dong Joo and Da Ji were once a couple who were married at 19 but they quickly divorced. Years passed, they both return to their old house and discover that their feelings for each other have been endured.
Yun-woo Kim works as a low level civil servant in a district office. Although he is thirty, he is still innocent for his age and has been on numerous unfruitful blind dates in search of a suitable wife. After moving to a new place, he runs runs into Soo-yong Han, a high school student who lives downstairs. Soo-young Han is a cheerful and eccentric eighteen-year-old who lives with her mother that acts like a princess.
Meanwhile, Sook Kang has just started to work at the district office straight after graduating from high school and falls head over heels for Ha-kyuing Kwon, a melancolic woman who always smokes in the same spot, becuase of her beautiful smile. Ha-kyung is still holding onto an old flame and keeps on looking for traces of that love every day. Sook Kang continues to keep wooing her, irregardless of her living in the past. Can their futures lead to a happy ending?
The drama will be about two men whose fates are crossed from the very first day that they were born. Both men were born in the same hospital. When he was a teenager, Lee Dong Chul witnessed the death of his father. From then on he promised to seek revenge on the man who caused his father's death, Shin Tae Hwan. But unbeknownst to everybody is the fact that Dong Chul's younger brother, Dong Wook, was switched at birth with Tae Hwan's son, Myung Hun. Dong Wook grows up to become a prosecutor and vows to help his brother seek revenge. But what happens when they find out that they're not brothers? What will Dong Chul do when he finds out that his real brother was raised by Shin Tae Hwan and that the brother that was beside him all these years is the son of his enemy?
After Seo Haneul (Sung Yuri) lost her mother in a fire, she was later adopted by a wealthy family and experienced a life of many twists and turns. Seo Gun's father had married an unwed mother, thus making Seo Haneul his sister in the eyes of the law. After their parents passed away, Seo Haneul was adopted by a wealthy chairman of a large organization who has also became a gangster. Upon using Haneul to extort money, Seo Gun and Haneul slowly fall in love with each other.
Jae-kyung is a high school senior but he skips school often. Once he turns nineteen years old, he is going to be a millionaire. However, the day before he inherit the fortune, his family lawyer tells him about the will from his deceased grandfather. It is specified that he can inherit the fortune only if he graduates from Boram High School, which is located in the countryside. He has no choice but to go there. Life changes a lot for him at Boram High School. He can't use his credit card or even drive his sports car!Meanwhile, as Jae-Gyeong attends this school, he meets Eun-hwan. She is different from the other people living in the country and seems to have some kind of secret. Jae-Gyeong starts to change his attitude, and Eun-hwan’s secret is about to be revealed.
Kang Jae-kyung is your typical spoiled rich kid; he’s arrogant, drives sporty cars, attends the big clubs, rides through school corridors on his motorcycle and - wait, that’s not typical at all is it? As his 18th birthday approaches he’s set to inherit his grandfather’s fortune, but that comes with a price. Jae-kyung is going to have to earn his fortune. His grandfather lays down an ultimatum; Jae-kyung is required to transfer to a new school in Gangwondo and graduate. Until then all access to his penthouse, cottage and credit cards is denied. Should he fail to graduate or drop out then he loses everything. With little choice he heads out to the countryside and a small town in which daily life is far removed from what he’s used to.
Shortly after settling into his new home he meets 19 year-old Choi Eun-whan, who just happened to run into him back in Seoul. They don’t exactly hit it off; he’s far too stubborn and cool for school, while she sees hope for him and sets out to make him see it for himself. As they eventually draw closer, thanks to a set of coincidences and school projects they learn more about one another, but soon a shattering revelation will change these people forever, or something.