Min Soo is a 14-year-old boy who is engaged to a woman 7 years older than him. As he knows that the woman likes another man, he makes a wish so that he can protect his love. As the result of his wish, he becomes a 25-year-old man. Tae Ri is a well-educated woman who comes from a wealthy family. After being hurt by her first love, she doesn't believe in love anymore. But, as Min Soo suddenly appears before her, she starts to have feelings for him...
Japanese-Korean girl Junko (Lee Cheong Ah) travels to Seoul as an exchange student in hopes of seeing a Korean student whom she had fallen in love with in Japan. When she arrives at her new university, she finds out that her love-to-be is in the army.
On top of that, the guesthouse she's staying at is full of rowdy young guys, including the owner's grating son Jong Man (Park Ki Woong) who also happens to be her Korean tutor. This disagreeable tutor, however, is a lot more interested in teaching her inappropriate words than conjugation.
The two initially spend all their time fuming and feuding, but Junko slowly discovers there's more to Jong Man under his insensitive exterior.
Kang-jae grew up under a jobless, gangster father. When Kang-jae accidentally meets Lee Dae-hae (Suh In-sok) and his son Sun-mo, he feels more attached to Dae-hae than to his own father. Through Dae-hae and Sun-mo, Kang-jae learns the basics of magic as well as what fatherly love really means. Sun-mo, on the other hand, has a love-hate relationship with his father, who only cares about magic and nothing else. Meanwhile, Sun-mo is heartbroken by Dan-young, who falls in love with Kang-jae. Before that Dan-young was living with Sun-mo, mistakenly thinking that he is her long-lost brother before she was adopted. Yun-jin, Dan-young’s stepsister, instantly falls in love with Kang-jae and Kang-jae decides to marry her, not for love but for the sake of fulfilling his own ambitions at the price of spurning Dan-young.