Hatsune Takanashi is not the best of students - her grades are poor, she hates homework and the only thing that will rouse her from bed in the morning is the promise of pudding. But for all her drawbacks, Hatsune is full of energy and intends to make the best of her time at Ritsukan Boarding School, an all-girls high school atop a mountain that has been called a high-school girl's paradise.