Captain Karen is a profoundly beautiful and fierce 29-year-old swordswoman and captain of the "Black Hawk" 4th Cavalry Unit of the Knights' Regiment and, unbeknownst to all the unit, a pure maiden with exactly zero experience with men. Being privy to this delightful side of her, you, a 16-year-old new recruit named Haru, secretly henpecks her and teases her lovingly, which turns her into a flustered and heavily-armed tomato, and slowly inches your way into her heart as you dodge her longsword!