Her Majesty the Queen, Don't Even Think About Attacking Me!

Traveling through a medieval castle, Matthew, a talented student in the Department of Architecture, hopes to use his architectural knowledge to transform and upgrade the castle's defense system. I want to fully display my ambitions that I had not developed in my previous life in this life. Become the Queen's most capable general, build the strongest fortress in the world, and become a man of note who can go down in history with absolute defense. However, his design efforts are just a pile of waste paper in the eyes of others! Until one day, the queen actually chose him! I thought I was going to let him renovate the castle, but I didn't expect it was just... Her Majesty the Queen! You can't even think of me! My defenses are impeccable! ! !