Hakushaku-ke no Aisare Keiyaku Reijou

Unloved by her family and alone to her last breath, she reincarnates into a novel’s world as a girl raised in hardship. One day, the heir apparent of a count’s house appears, claims to be her father, and proposes a contract father daughter arrangement. Confused but desperate to escape, she accepts. She may be his real daughter, but their bond starts as a contract what future awaits this unusual

(Source: Piccoma, translated)