The RED TROUBLEMAKER – She causes various types of trouble to herself, her family and everyone. Her hair is RED in colour. ‘Don’t you even care about me because you won’t see me sooner or later..’
Her biggest problem is she always argue with her twin sister, Jessica Jung.

The ‘Llama’ – She is a girl but she acts like a boy. She knows that the RED TROUBLEMAKER is actually a kind-hearted girl. She always finds a way to be friends with her.

The BWCW – He is the BOY WHO CRIED WOLF. He is Llama’s friend. He falls in love with the RED TROUBLEMAKER. He loves just the way she is –with her long straight red hair, her not-so-good attitude, all about her.

The ‘Ice Princess’ – The RED TROUBLEMAKER’s twin –older than the RED TROUBLEMAKER by 6 minutes. She always argue with her twin sister because of her twin’s attitude. She knows that the ‘Llama’ is going to be a good friend for her twin. After knowing the ‘Llama’ and her best friend -The BWCW, she slowly starts to feel the true meaning of first love. But.. There’s one thing about her that nobody knows even her twin.

What happens when a troublemaker meets a girl who acts like a boy? What will happen after that when a BWCW falls in love with the troublemaker? Soon, what is happening when the troublemaker’s twin sister is falling in love with the BWCW? The results are complicated to be exact. But the main point is, when a troublemaker changes into a good girl..