Duke, please let go of my ankle!

I sent you a love letter written in the early morning by mistake.
That too, to Duke Derek Frit, most likely person to be sent to war, the most likely man to break the bed on his first wedding night, and the bloodbath of Creant…
Duke! Please, please, please return it without opening it!

[(Exclusive) Duke Frit, We must find the main character of the letter.]
[(Breaking News)An Official from the Dukedom’s Ministry said, The culprit is meticulous and cunning… You will pay the price in blood.

The letter, which was sealed, eventually came out to the world.
however, Is it a little strange that the man seemed ready to catch and kill Audrey at any moment?
Doesn’t he wear flashy clothes that he didn’t wear before?
Doesn’t he say things that I didn’t know whether it’s a compliment or a murder warning?

“Your eyes are just like the hilt of a treasured sword.”
“… yes?”
“It was a beautiful sword given by His Majesty ahead of the war. As soon as the fly landed, it split in two. It was a beautiful green hilt… … It turned red as it was stained with blood. “No matter how much I cleaned the human blood, it wouldn’t come off.”
“!”

Audrey’s face turned white.

‘Does this mean you want to cut off my breathing?’

A romance of mutual misunderstanding between Duke Motaesolo, who is in a somewhat strange courtship, and Audrey, whose nose is pierced by a wrongly sent letter.