Tensei Shoujo wa Kyuusei wo Nozomareru: Heion wo Mezashita Watashi wa Sekai no Juuyou Jinbutsu datta You desu

After remembering her past life in modern Japan, Lena refuses to accept a life of poverty in the slums. Armed with intelligence, quick calculation skills, and determination rather than overwhelming combat abilities, she steadily improves her circumstances through honest work and clever ideas. As her reputation grows, she unknowingly becomes entangled in events that could determine the future of the kingdom—and perhaps the world itself. The series blends wholesome slice-of-life moments with fantasy adventure and gradual political intrigue.