I Got Engaged to the Blind Duke

Reborn as a side character in a novel, Marin swears she'll avoid every major figure in the story. But when her family collapses overnight, she finds herself cast out onto the streets with nothing. "I need money—fast." Forced by circumstance, she accepts a six-month temporary position at the estate of the novel's blind male lead, Duke Gerald.

"How is life in the duke's manor?"
"Thanks to Your Grace's generosity, I'm living quite comfortably."
"You like living here? Then we should get engaged."

Marin freezes. How does enjoying life in the manor suddenly connect to an engagement?

"Congratulations. Now you can keep living in the place you like."
"By any chance... do I have the right to refuse?"

(Source: Kakao Entertainment, translated)