Kwon Yuri : A lonely soul. She is terribly afraid of being alone, and she keeps her fear at bay by enclosing herself in the city life. She always puts on a bright face, hiding her true self, although she wishes for someone to love her for who she really is. Somehow, she cannot seem to find any real friends who want to spend time with her, without partying or having .

Jung Yunho : A free spirit. He does whatever he wants, whenever he wants. He is fairly quiet, but is the opposite of shy. He has many friends, but he prefers to be alone. He is popular with women, who are attracted to his looks, and with men, who are also attracted to him by his charm and charisma.

Kim  Jaejoong: An inveterate womanizer. He loves girls, although he can never stay with only one. The more he gets to know a woman, the more he gets turned off. He sees women as toys. Despite his twisted outlook on women, he is a witty and likeable gentleman.