Goo Jae-hee lives in the United States and one day sees a track and field competition on TV, and becomes attracted to one of the high jump competitors, Kang Tae-joon. She begins to idolize the young athlete and eventually transfers to Korea to attend the same school that Tae-joon attends after he suffers an accident that could potentially end his career. There is a catch, however: Tae-joon attends an all-boys high school and Jae-hee must disguise herself as a boy to enter.

Eun-chan is often mistaken to be a boy due to her appearance. So when she gets hired at a coffee shop, she keeps the ruse going. Problems arise when her manager starts falling in love with her.

The story is centered around Filena, a princess who was raised as a boy after her kingdom was conquered.

Babysitter Gin Shimochiai's wish is to deliver love to children and parents!

Gin, a man dressed as an English maiden inspired by her childhood nanny and the story of Mary Poppins, established a babysitting agency solving the problems of parents from different families in his own way.