Tensei Around 30 Joshi no Isekaikatsu: Seiryaku Kekkon wa Iya nanode, Zatsugaku Chishiki de Tanoshii Kaikaku Life wo Kekkou Shichaimasu!

One morning, a woman in her 30s living an ordinary life wakes up to find that she has been reincarnated as Magnolia, the daughter of the Gilmore Marquis family...!? She is excited about the prospect of a carefree life, but what awaits her there is confinement to her own room and mistreatment from her family. Unable to bear it any longer, Magnolia decides to escape from the Gilmore family in order to seek freedom and live alone!!

(Source: Shueisha, translated)