Quick Transmigration: I'm the Villain's Assistant to the Protagonist

Shen Ying, an ordinary office worker, is unexpectedly chosen by a mysterious system, thus beginning her journey through various bizarre game worlds. However, each time she returns to reality after completing a mission, her memories of the game world are ruthlessly erased. What? She's supposed to take the zombie villain to the female lead for dissection and research? Is she supposed to become fast food for the zombies? What? Becoming the villain's ally and helping the female lead save her friends? No need for the system to erase them, the villain will just eliminate them directly! What? Preventing the villain from turning love into hatred—she herself hasn't even had any dating experience! What? What? What? And there's more! Shen Ying finds it strange: why is it that the things she encounters...