Jiyeon's a girl who's quiet. She doesn't bother on starting a conversation with whom she doesn't know that much. Even with her classmates. She's good

Suzy's a typical girl. A good student with high grades. She's sweet but turns into a 'wild animal' when someone tries to annoy her. Suzy has a best friend named Jiyeon. She's the quiet-type, avoids attention and looks like she can't even hurt a fly--thus, making it weird why Suzy