The Poor Lady's Impulsive Proposal Somehow Leads to Getting Locked Up by the Infatuated Duke is a Manga/Manhwa/Manhua in (English/Raw) language, ROMANCE
series is written by Updating This Comic is About
From Gourmet Scans:
"Umm excuse me... Are you willing to be my fiance?!"
What was meant to be their first meeting became a once-in-a-lifetime confession for Alice, the bullied daughter of a poor noble. Not only that, the one who accepted was the Duke heir of the Verfeze Kingdom! In an unexpected twist of events, the handsome Arthur Grindelvalt agreed with a kind smile to the timid Alice, swearing "I will do anything for you."
Following that eventful meeting, Alice took the first steps upon her path to become the future duchess. What she did not know was how dangerous that path would be, with endless doing all that they could to take advantage of her timid personality. However, no matter what predicament she finds herself in, time and time again, Arthur's love for her only becomes more and more passionate.
From going together to school and making their way home again each and every day, to letting her live with him at his mansion and even installing a lock for her room...?!
"Don't worry. I won't let anyone touch you anymore."
(...Why does he love me so much?)
A secret past between the two of them will bring forth a sweet, romantic miracle in this classic Cinderella story that will sweep you off your feet!