Herscherik: Tensei Ouji no Eiyuutan

A 35-year-old otaku woman, Ryouko Hayakawa, was meant to die in a traffic accident the day before her birthday. Instead, she awakens in a fantasy world reborn as Herscherik, the seventh prince with blond hair and blue eyes. Enjoying a life of ease as a prince, he observes the kingdom's deep problems at just three years old. The king is widely disliked by his advisors and officials, and corruption is widespread. Determined to improve the situation, Herscherik uses the skills and talents he had in his past life, including office work and deception, to take action and help the country.