Mundus vult decipi, ergo decipiatur

Mundus vult decipi, ergo decipiatur is the 12th volume of the Youjo Senki light novel series.

Short Summary:
Loria loathes Zettour so much for countering his plan to get Tanya. He has no time left. The general is determined to become the enemy of the world in order to save the country. Tanya will be overworked to complete the secret plan. He will take appropriate actions while wondering where the true meaning of his words is. The wear and tear of soldiers is not good for imperial wars. Tanya is fighting while considering her safety. Zettour decided to take the enemy's combat abilities in a cheap way. And he plans a very nasty operation and put it into action. It is also his strength to have an understandable executor named Tanya.