Has the Villain Turned Evil Today? [Quick Transmigration]

To return to the real world, Yan Chaoyu has no choice but to accept the System's request: win over the villainous Boss who will destroy the world, and set out to save it. But...

Yan Chaoyu, gritting her teeth: System! I did exactly what you told me to do to win the villain over, so why did he still turn evil in the end? Explain yourself!!!

System, meekly: ...No matter what, as long as they don't destroy the world, that's fine, right? Host, I believe that for the sake of those innocent worlds, you won't mind these little details! Anyway, ganbatte!

Yan Chaoyu: ...Who wouldn't mind this? What do you mean, little details? This unreliable System, is it too late for me to return it now?!

Warning: This is an extremely self-indulgent story! If that's not your thing, don't read! Also, the villain is the same person from beginning to end. This is a wish-fulfillment story about the male and female leads sweetly falling in love, with a little fun on the side now and then (ahem)!

Theme: