This is a romantic story about the love between seemingly incompatible people. One day, a young girl named Bon-hi has a very unlucky day. First, she argues with a man on the subway, mistaking him for a pervert, and then she catches her boyfriend in the arms of another woman. In anger, she swears to sleep with the first person she meets as revenge... and by chance, that person turns out to be the "pervert" - lawyer Chi-uk. Furthermore, the girl gets an internship position at his company.