Being called useless, my house is independent! (1) / Yu Kurono B' slog Comics

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

This Lady is too invincible? The story of the development of the Angry Land that begins with the annulment of the engagement! She is the daughter of Margrave Floras who was unilaterally told by the Crown Prince that the engagement was annulled. To be honest, I don't care about it, but are you saying, "The Margrave family is useless only at the edge of the country" and selling them in a fight? (Angry) In such a situation, the land was attacked by a horde of demons -?