Yoon Mi who was a nerd before, now changes into an assertive girl. She has a younger sister, Hyun Mi who likes Min Woo, her classmate but Min Woo doesn't have any feelings with her.
Then Yoon Mi meets Ki Seop.
What's going on after that?

Characters:

• Kang Yoon Mi, 19 years old, an innocent girl that tries to become an assertive girl. She wants to show her friends that she isn't a stupid and weak girl. She was a nerd before. She thinks that become a nerd is annoying because people can mock her and because of that, now she hates to be a nerd.

• Kang Hyun Mi, 17 years old, Yoon Mi's younger sister, often gets teased by her sister. She's not good enough in subjects, but really good in gossiping.

• No Min Woo, 17 years old, Hyun Mi's classmate. Many girls like him but none of the girls that he likes. He likes finding out the things that make him curious. Whatever it is.

• Lee Ki Seop, 21 years old, a guy with permanent establishment. He will protect the girl that he loves, eventhough he had to hurt for her. He is an assertive guy. He thinks careully before taking a decision.

• Jo Young Min and Jo Kwang Min, 17 years old, Min Woo's bestfiends. People call them Jo Twins. Many people hard to distinguish between Young Min and Kwang Min.