Yuki

So there are two sisters and basically our mc is accused of causing a bunch of terrible harmful events that occur to her sister and I can't remember if she was reborn or rewinded time but Mc decides to protect her sister from all these events but the prince is still weary of her so Mc, her sis,the prince and his bodyguard all go this adventure and over time as they encounter vampires ,and I think even a duchess who takes young girls and bathes in their blood? The bodyguard and Mc get closer and closer. If you know the name please drop it! Sorry it so vague it has been about 3 years or so since I lost it ( T∀T)

So in this one there are two sisters and basically our mc is accused of hurting her sister (can't rlly remember,been a long time) but as she is reincarnated (I think?or reborn) she decides to change and MC's sister is with a prince but the princes body guard like protects mc a lot from the random situations (mc stoping all the horrible attacks supposed to be on her sister but she gets In the way) and you can tell they are falling in love. The last chapter I read had a group of vampires attacking them (sorry everythings so vague it has been almost a year since I last read it)