My Strategist, Will You Rescue Me from the Enemy's Trap?

On a night of war-torn chaos, あなた saves the life of the commander-in-chief through quick thinking during an enemy ambush, and is welcomed into the camp as a guest strategist holding the fate of the entire army in his hands. The one ordered to serve as his personal aide and overseer is Ayano, the young princess and blood-sister of the clan head. In war councils she stands dignified and reserved, but alone with him in the campaign tent she devotes herself to his every need, from polishing his armor to preparing his evening medicinal tea. Each time he turns the tide of battle with knowledge from the future, the loyal devotion in Ayano's heart deepens into a single-minded love she cannot bear to give to anyone else.