This story is not happy ending

‘Lear’ had read a novel and was dissatisfied with the ending of that novel. The villainess with the name like her, ‘Lear Cabares’, is betrayed by ‘Draven Ernest’, the male lead, and her legal husband, who cheating her and have a relationship with ‘Phenia Talcum’, the female lead. Besides, two of them kick Lear out of the mansion until she has a pathetic end. Lear could not bear to see a villainess has ended up like that. So, she uses her special abilities to enter the world of that novel to reclaim the justice of the villainess.

Why would the villainess have to be treated like that? She did not do anything wrong. I am going to seek justice for you!

But when Lear enters the story, she discovers some truths that change her life forever.

"Lear, don't leave me," said Draven with a pained expression.
What is this! Why would a protagonist like Draven say to me who is a villainess?! Or have I successfully changed the plot at the end of the novel? Isn't the ending of this story a happy ending?