Life in a house with no grown-ups seems to be doing wonders for Kajitsu. For the first time in her life, she has a best friend, and to everyone's surprise, she's taken an interest in boys. Too bad her crush is on the new Calligraphy teacher Akai-sensei!Things aren't going quite as well for her step-brother and classmate Natsu. As the smartest kid in school, his teachers hope he'll boost the school's sagging reputation by getting into Japan's top university - no pressure!And Natsu still hasn't come to terms with the tragic events that took away the gentle smile that Kajitsu so loved. What happened to him in those years apart?