After I Transmigrated into a Book, the System Made Me the Villainess

[Single Female Lead] [System (It'll Be Gone Soon)] [Yandere] [Female Side Characters] [Slow-Build Romance] [Transmigrate into a Book]

After transmigrating into a book, the System gave me two missions:

1. Maintain my character setting.

2. Make trouble for the heroine of the book at every turn.

3. Keep the story moving forward smoothly.

4. Bring the male and female leads closer together.

Once I completed all of the above, I could return to my original world and carry on with my life. If I failed, I'd be killed.

But this System seemed to have it in for me, constantly forcing me to do pointless missions. I nearly got killed when I accidentally gave myself away, but luckily, this world had such a huge bug that it glitched the System into a complete standstill. I survived, changed the plan to what I wanted, and unexpectedly got the life I'd dreamed of.

Little by little, I became part of this world, doing my best to get the male and female leads together and shooing away every other woman who tried to get between them.

But to my surprise, everyone here started deviating from their original character settings, and I was dragged into the game, becoming its greatest victim...

A word of warning: this story does not have a happy ending.

As far as "I" am concerned, there is no official pairing for me in this book. I see everyone as a friend.

<This book is written entirely in first person.>