Herscherik R: Tensei Ouji no Eiyuutan

The day before 35-year-old otaku lady Ryouko Hayakawa's birthday, she met her end by way of a traffic accident―or at least, she was supposed to. But when she opened her eyes, she found herself in a fantasy world. What's more, she had reincarnated as the blond-haired, blue-eyed seventh prince, Herscherik! Fully enjoying a leisurely prince life free from worldly cares as a prince, Herscherik finds the king of this great country despised by retainers and officials alike, with corruption running ram...