Himesato Ui has just enrolled in her late mother's old high school, Shinomiya Academy, as a first year! Hatsu's mother was known as "Prima," the most beautiful girl, in the Academy. Ui was full of hope and expectations in enrolling in the Academy, but she feels puzzled by the Academy's system of evaluation for students which is by a point system. Furthermore, in the school, she meets an unknown pretty boy?!