Transformed into an Apocalypse System, Taking Over the Host's Job

Li Nai, a homebody who loves reading novels and playing games, with no looks, no money, and no parents, thought her life would never change.

Unexpectedly, a mysterious virus swept through the world, and recovered patients turned into bloodthirsty monsters running rampant. At the same time, Li Nai transformed into an apocalypse system. Her only mission was to convert the four villainesses deeply connected to the virus and end the apocalypse.

As a system, she was omnipotent. A few mere villainesses? Easy to handle! She confidently turned around to look at her two hosts:

One was a big-eyed cute baby sucking her thumb and drooling; the other was a panda cub rolling around and hugging legs. Instantly, she cried out to the heavens and slammed the door shut.

"Waaah, what am I going to use to convert the villainesses? Covering them in drool, or clowning around by rolling on the ground?" After a struggle, Li Nai had to resign herself to fate and decided to take matters into her own hands, possessing the host and beginning the "actors, please take your positions" phase.

However, before she could even start, her identity was exposed... On the Nth day of mission failure, Li Nai suffered revenge from the corrupted villainesses, was locked in a cage, and began her Nth night of deep regret. "If I had known this, I should have enrolled in an acting intensive course."

Small Theater:

Li Nai sneaked in to become a cleaning maid beside Villainess 2, diligent every day, looking for opportunities while cleaning. One day, she entered the bedroom and saw another charming and seductive woman lying on Villainess 2's bed.

The system's eyes scanned, identifying the other party as Villainess 1. Her broom slipped and fell to the floor. Villainess 1 woke up with a start, revealing ambiguous red marks on her neck, and commanded in a hostess-like tone, "Aunty, help me get that novel from the table."

Aunty?! Li Nai nearly ground her teeth to dust, suppressing her immense grievance and anger. She picked up the book and saw its title: "Apocalypse: I Am the System." Her heart immediately pounded wildly. Behind her, a pair of deep, beautiful eyes, like venomous hooks, pierced the back of her head.

Villainess 1: The unrestrained and flirtatious superpowered assassin. "I like you. Haha, just kidding, don't take it seriously. But I quite like your kid and the panda."

Villainess 2: The ruthless and suspicious, beautiful mixed-blood boss. "Dare to show even a hint of disdain for my past, and I'll use this gun to kill you. The child is mine."

Villainess 3: The sister-complex, cold, and violent successor to a biochemical group. "I want you to do with me what you did with my sister, not one bit less. Wait, not in front of the child."

Villainess 4: The gentle-faced, dark female doctor, mother of the virus. "Want to capture my heart? As long as you come with me to the happy house and survive until the third day, I will fulfill the kitten's mission."

The story also includes elements of