@-stvrrlightt- The novel talks about Jungkook who is married to the love of his life Luna and about Rosie who is his cousin
Events of the novel: Jungkook, his family, Rosie and other people are in mourning for Rosie's father, and Rosie collapses from crying because the last thing left for her is dead because her mother died when she gave birth to her, and she was lying in the lap of Mrs. Jeon, his father Jungkook, and Leona was not present on the grounds that she doesn't like sadness.
A few days later, Jungkook's father decides to travel with his mother for business, and because Rosie is with them, they won't leave her alone, so Jungkook's father decides to let Rosie go and stay with Jungkook for a while, but Jungkook's father refuses and decides to marry Rosie to Jungkook.
At first Jungkook of course refuses because he is married but with his father's insistence he only marries her for a while and Rosie was refusing because she doesn't want to upset Jungkook but inside she is very happy because she married a childhood love
After Jungkook marries Rosie, Leona is angry and wants revenge on Rosie, she tries to ruin her relationship with Jungkook, and indeed, after Jungkook's attempts, he becomes disgusted with Rosie and makes her like a servant.
And days and days pass and Rosie naturally hurts because she works as a maid and is treated badly by Leona and Jungkook who is the love of her life and her cousin Jungkook agrees with this
Note: Jungkook is two years older than Rosie and Leona and Rosie are the same age well, and it's true Jungkook is having sex with Rosie under the pretext that she is his wife And it's true that Leona doesn't like Jungkook, she's with him for the money.