The show starts off with the younger versions of Song-yee (Jang Na-ra), Hee-won (Hong Eun-hee) and Hyun-sung (Kim Rae-won) at elementary school.

Later, during a class exercise, when the teacher asks the children to choose a boy to sit with for the new seating arrangement, Song-yee immediately grabs Hyun-sung's hand.

There, Song-yee is given the job as a mascot, having to wear a hot suit with a huge head (think Mickey Mouse at Disney World).

Song-yee, who is naturally hot-tempered, doesn't enjoy this job too much, and is seen by Hyun-sung (who also works at the amusement park) and his friend, Yang Sam-yeol, bullying some kids after they touched her chest.

His friend, Sam-yeol, fell for her at first sight and schemes to make Hee-won fall for him by pretending to like Song-yee.

Over the next few days, Hyun-sung and Song-yee continue to have confrontations, though he begins to see a somewhat gentler side of her as she really thinks that Sam-yeol likes her.

Needless to say, when she finds out that he only pretended to like her because he wanted Hee-won, she doesn't take it very well and once again decides to unleash her wrath.