Summary

Mercenaries Those who failed to become knights but possess comparable skill.
They don’t pursue honor like knights do — if there’s payment, they’ll take on any job.
Because of that, they are looked down upon.

Regina, a mercenary, gave her all to every mission.
As a member of Persona, the mercenary group that is as different by day and night as the two sides of a mask,
And though the nickname made her cringe, she was known as the Princess of the Mercenary World.

“I don’t need a bodyguard. I need a wife.
Someone who can protect me when I lose my mind,
and someone who can clean out the rats gnawing away at my estate.
That’s the request — to become my wife.”

While recovering from nearly dying on a mission, Regina visits the mad prince Valentin to collect her life-saving fee —
Only to be met with an unexpected marriage proposal.

“Is this some kind of joke?”
“Do I look like I’m joking? I’m being serious.”

“Let’s make a deal.
A duel, where both of us get what we want.
Depending on the result, I’ll either shut up or disappear from your sight — whatever you wish.”

To protect her mercenary group, Regina accepts Valentin’s marriage request.
She swiftly defeats the knight commander who doubted her in a duel,

“Don’t try to outwit me.
I’m the only one who can open the door I sealed.”

And even forces the scheming head maid — who had been eating away at the estate — to surrender with sheer mercenary grit...