I Am a Child of This House

"Pink Eyes" has always lived a relatively normal (?) life, with two exceptions: first, she has gained memories of her previous life as Seo Young, and second, she is someone's illegitimate daughter.
One day however, when she turns 11 years old, her prostitute mother takes her to the empire's sole duke and claims her as his child. Although he seems to not believe her, he nevertheless buys "Pink Eyes" for 20,000 gold. With that, her new life as "Estelle" starts.
But what truly awaits her? And is she really a child of this house?

(Source: MU)