Tensei shita Ore ga Kawaii Sugiru node, Aisare Chara wo Mezashite Ganbarimasu

I was hit by a car while protecting a child, and before I knew it, I had been reincarnated as Yumie Granbell, the daughter of a count in another world. When I looked in the mirror, the reflection staring back at me was an extraordinarily beautiful girl who looked like an angel! Moreover, the Granbell family, into which I was born in this life, is a prestigious magical family with considerable influence. I thought I had hit the jackpot in life, but it turned out that the Granbell family was actually on the verge of collapse… To restore the family, I decided to use my kindness as a weapon!

(Source: ComicWalker, translated)