I Transmigrated into a Book Set in the Apocalypse, but Got a Romance System?

(Also known as: After My System Was Exposed, They Started Making Moves on Me)

Yan Dong transmigrates to a post-apocalyptic wasteland where zombies roam everywhere and everything is lifeless.

Good news: As someone who transmigrated, he comes with a System.

Bad news: It's a romance System.

Come on, man. He transmigrates to a zombie apocalypse, and they give him a romance System? Who's he supposed to date? The zombies?

What kind of ridiculous deal is this?!

But somehow, more and more women start showing up around him...

Soon, they discover that every time they and Yan Dong try out a certain special position, they inexplicably receive a generous supply of resources.

And then they all change...

"Yan Dong, what new tricks have you thought up for today? Big sis will do anything to please you~"

"That's not fair! I was here first. It's my turn today."

"Do I have to chop you up before you'll stay by my side forever~?"

Wait, ladies, we're trying to survive the apocalypse! What are you doing?!