Kaname Fujimori swore when he was young when a knight saved his life. ――One day, Become a knight who can protect more people than anyone else. As time passed, it was decided to enroll in the knight training school Shiramiya Gakuen and to join the Shiramiya Knights Esquire. What I was waiting for was an encounter with friends who will work together as a knight group. He reunites with Elsia-Havens, a beautiful blonde girl who vowed to become a knight when she was young. And, as if to follow the point, his younger sister Yu who became a classmate forcibly in the skipping class. If you notice, all the members of the Knights are women ..., one man ...!? In short, the point is that he has taken the first step as a knight, while leaving his uncertainties about his future.