Kwon Mi Yeon,Kim So Ri & Son Nam Mi are best friend since diapers.Study together in SM Highschool,which located in Seoul,South Korea.Their father mother's are in America for their business.They never care for their daughters.They will just hired a maid & let them arrange it.Their life are full of pain & tears.But they still survive until 20 years old.Firstly,Kwon Miyeon,who fall in love with a icey cool boy call Oh Sehun.But Sehun like a girl who call Jung Sun Rin.Who will not fall that goodness Sunrin? She was beautiful,smart,kind & cheerful.Second,Kim Sori,who was always cheerful & also known as Happy Virus in the school,one day became a gloomy person.She never smile or laugh anymore after she met her ex-boyfriend call Xi Luhan.But they was someone who love her deep in his heart,he never tell to anymore nor his friends.The boy was her classmate,Jeon Jungkook.Third,Son Nammi,who was also fall for a boy call Jung Daehyun.You may thought that Daehyun was cool like Sehun? No,he isn't.He treat her kindly,will buy everything to her & even comfort her when she was sad or angry.But one day when Nammi heard his conversation with his friends,she was shocked.Was Daehyun really love her or he has some reason? Keep reading to find out more!