Unshakable Female Lead in Regret Genre

Read manhwa Unshakable Female Lead in Regret Genre / It turned out I was the heroine of a "regret story." And, as it happens, I'm currently in the phase where the story's male lead and his family are piling up karmic debt! "Wowso they tormented me this much? That's harsh." But it's fine. In my previous life I spent over ten years working various service jobs, so I can handle any troublemaker with zero scruples! "Giselle, I can no longer endure your insolent words and deeds. Didn't I tell you to be silent?" "Oh, really? Fine." "What's that?" "As Lady Mariposa said, I'm filthyso I'll don a garbage bag and bury myself underground right away. What's the use of someone like me living?" I merely decided to cut ties with the family that was bullying me and resolved to become stronger than any of the male leads "Giselle Florette. I would like you to become my wife in name." The secret mastermind, Duke Callinos, has proposed to act as my husband? "The fee is five billion gold per year." "I will serve you faithfully." "By all means, behave in the most despicable wayso that my family grows absolutely sick of marriage." Pulling off troublemaking was the easiest thing in the world!