Quick transmigration. The female lead has no fixed romantic pairing, and she doesn't necessarily fall in love in every world. The story leans more toward plot.
Yun Shuyue, a wage slave, won a huge lottery prize. She celebrated late into the night and suddenly died in her rented apartment. Who could she even complain to about that? After death, Yun Shuyue discovered that her soul was floating in a vast white space. A white ball of light introduced itself as System No. 257, from the Quick Transmigration Bureau. It said that if she completed missions, helped supporting female characters change their fates, and accumulated enough fortune points, she could get the chance to be reborn. So what was she waiting for? Let's get started.
World stories:
First world: The White Moonlight Refuses to Be a Stepping Stone
What, the male lead is a jerk? No problem. I'll send him straight to prison.
Second world: The Childhood Friend in the Apocalypse Refuses to Be a Free Blood Bag
What, the male and female leads want me to be their free blood bag? And they want to feed me to the zombies? Then one of you can be zombie food, and the other can be the blood bag.
Third world: I Won't Be the Saintly Younger Sister's Target for Moral Blackmail
What, my saintly younger sister wants to morally blackmail me? Sorry, I have no morals, so you can't blackmail me.
There's plenty more to explore. Come on in and see for yourself. The author updates consistently.