Romantic isekai

After a car accident with her niece and sister, she isekai's into a fairy tale she read in a book as the abusive sister of the FL, who can cry diamond tears. The book was extremely vague with descriptions, so she doesn't know who the ML of the book is, but she will do anything to get the FL her happy ending.

Died from overworking and accidentally possessing a storybook villainess's body, she tries to avoid having anything to do with the plot or her fate. But the dragon egg that caused the beginning of the original story somehow ended up in her hands </3

Years of building up the family name was gone when MC found her twin sister in the arms of her fiance. Having fallen into their plan to destroy the household, MC also fell into agony about her wasted efforts.

After waking up from her nightmare, she realizes its the day she meets her fiance to talk about engagement. She refuses to repeat the same mistakes again, and it all starts with him.