Sarah was a normal school girl if you count being the smartest in school normal. But she was lazy. One day when she was walking home she got hit by a car and died. Luckily? for her, she was reincarnated. Into an otome game, as the villainess. But with her being lazy she didn't care much.

"Didn't you like me?" he asked. "I didn't." He frowned. "Then... do you hate me?" "I don't." "...Then what do you think of me?" "An annoying moron." "I'm already sleep-deprived," I said flatly. "Why should I think about something else?" -- The game said she would die if she attended the academy. 
It also said she would die if she didn't. Either way, her death was guaranteed. So when I opened my eyes in the body of Melissa Valkyrie, a doomed noble lady fated to die in every route, I did what any sensible person would do: Nothing. No schemes.
No revenge.
No desperate attempts to "fix" the story.
No scrambling to survive a game that had already decided my ending. If death flags wanted me, they could wait until after my nap. -- Suddenly, the male lead walked over and placed my notes on the desk. "How did you solve these problems and still get a D in Mathematics?" I didn't look up. "Why answer all of them," I said "when the professor said the passing score is only thirty?" "Anything more is a violation of mental health." -- But unfortunately, the world mistook my laziness for confidence. 
And now everyone thinks I'm dangerous. Because apparently, doing nothing was the most dangerous move of all.

A Dying Villainess