Assassin Empress Bellreuge

Bellreuge is just a handmaiden working for the first princess of the Empire—that is, until she abruptly receives a marriage proposal from the (in)famous son of a margrave Asturm, also known as the Bloody Wolf. The first princess, who also happens to be Bellreuge's older half- sister, forces Bellreuge and Asturm to flee the Imperial Capital with soldiers hot on their heels. Luckily, Bellreuge can fight...because she's lived under the constant threat of assassination since birth. Now exiled to the unfamiliar Margravate of Beiermen, she'll have to find a way to make the best of her situation. Little does she know that events have moved faster than she ever could have anticipated, and that together with Asturm, she may end up deciding the fate of the Empire itself. Source: Cross Infinite World