A clumsy High School girl named Choi Jinri who is at the bottom of her class has a crush on a popular genius male student, Kim Jongin ever since she first layed her eyes on him. Jinri tries to confess her feelings to Jongin through a letter but he rudely rejects it and gives it back with a mark of D-. However fate intervenes when an earthquake destroys Jinri's family house, and Kim Jongsun, (which happens to be Jongin's father), invites Jinri and her father to live with them, but one of Jongin's classmates, Jung Soojung, who is deeply in love with him, decides to make everything worse

" Such a clumsy girl, you'll never get a husband! not even a boyfriend! "

" Who would want someone so arrogant like you?! "

" You should just go and never come back, leave us alone! "