Based on a mega popular bestseller of Korea, this drama is somewhat like the drama Snowman because of the fact that the step-sister falls in love with her step-brother and vice versa. Hyuk-soo is somewhat a cliched Korean character. Good at fighting and smart, but chooses the wrong path (almost as if he's forced to be a jopok); has morals; is loyal; and most importantly, loves one woman only. Eun-hae's mom and Hyuk-soo's dad, both widowed for a long time, fall in love and decide to get married before Eun-hae's mom dies. While this is going on, Hyuk-soo and Eun-hae meet. Automatically they know they are in love, but since they become family, Hyuk-soo looks at her in a way an older brother should ... or does he?

Can a childhood crush survive into adulthood?

One foggy spring day, the 12-year-old Hyeok-su meets the young Eun-hye and determines then and there that he will love her for the rest of his life. Many years later, Hyeok-su is preparing to enter college when he rescues a woman from assault. It turns out to be Eun-hye. Despite the passage of time, neither had forgotten the other and they renew their relationship. However Fate, perhaps in an attempt to add interest to this story, places another smitten man in Eun-hye's life. He is also determined that he will marry Eun-hye. Eventually, Eun-hye is forced to choose between them