I was transmigrated in a novel that was written by my older sister. But.. the atmosphere of the novel is a little strange?

My older sister got in a car crash and after her accident, I was suddenly able to fulfill one wish..

So I wished to live as the person my older sister cherished the most. And then.. I possessed a villain named 'Satin', but the main character 'Cain', a so called "righteous knight character", who keeps picking on me for some reason.

Even though I was not really a big fan of novels. But still I tried to dig into the secrets of the novel, and play as the 'faithful villain'

But.. my relationship with Caine started to become deeper than anyone else's.. And now everything's spiraling out of control..!!