After the Straight Man Dressed as a Lady

Shen Yan, a university teacher, died suddenly while working overtime and found that she had traveled through time and became the "eccentric" eldest daughter of an ancient general family. Facing the charming face in the mirror, he just wanted to stay in isolation - until the enemy troops pressed the border, his father died in battle, and the lives of the entire city hung on a thread. When Shen Yan gritted his teeth and tore off his embroidered skirt, carried the flag, and used gunpowder formula to blast open the enemy's city gate, the entire dynasty was shocked: How can this lady be a noble lady? It's clearly Yama on the battlefield!