Yoo Yeonjung, the brightest girl in school. She always looks so fresh, sleeps at least 10 hours a day, is always smiling and describes the world with sparkles and rainbows. In other words, she is the opposite of me, who wakes up with the need of punching someone, always has a migraine and is fretful the 98% of the time because of the horrible combination of coffee and lack of sleep.