K-jangnyeoga Yugamure Binguihamyeon

I, who was the eldest daughter of K, became the eldest daughter of a childcare center.

I realized this world was exactly the same novel I'd read in my previous life. In the original, my character was the "eldest son" and proud heir of the Northern Duke's family, but for some reason, I'm now living as the "eldest daughter." My parents even protect my younger brother, and the heir position has gone to him. I suffered as the eldest daughter in my past life, and now I'm the eldest daughter again! Isn't this the true destiny of the eldest daughter? I no longer desire the affection of my family. Instead, I will reclaim everything: loyal servants, legendary spirits, and even the position of heir, which in the original was monopolized by the eldest son! Everything that the original heroine, "Nesia," had, I will make it mine this time! ...But Nesia, why does this child keep showing interest in me?

(Source: Kakaopage, translated)