Herscherik: Tensei Ouji no Eiyuutan

The day before 35-year old otaku lady Ryouko Hayakawa's birthday, met her end in this world by way of a traffic accident――――or at least, she was supposed to. But when she opened her eyes, she found a fantasy world. She reincarnated as blond-haired, blue-eyed seventh prince, Herscherik! Fully enjoying a leisurely prince life free from wordly cares as a prince, Herscherik finds the king of this great country despised by retainers and officials alike, with corruption running rampant; quite the unpleasant state of affairs. Realizing this at a mere 3-years of age, to save the country Herscherik relies on the "office worker" skills and "conman ability" from their previous life, and now takes action!