Saving the Villain from the Heroine

Sielle is an ordinary handmaid working for the Grand Duke Ferzei Yekarte. The thing is... she knows he's a villain of a story she read in her previous life on Earth. With her prescience, she managed to foil an assassination attempt on her master, only to be framed for the crime! Worse yet, when she drank the poisoned wine to prove her innocence, she turns into a little girl... And now the Grand Duke wants to ship her off to a notorious family of assassins? Will she manage to survive through all this, even if she knows how it will all end?