I Rewrote My Fate in This Novel World

Summary

I've always been the sensitive, suspicious type, so after finally getting together with the guy I grew up with, a knot of anxiety was always coiled in my stomach.

One day, I happened to see his phone screen light up. A new message notification popped onto the screen: "I'm not trying to be the other woman. I just want to be your puppy."

Beneath the message was a photo. In it, a girl was wearing a very distinctive collar around her neck.

Coincidentally, not long after, I found the exact same collar in the trash can of my rich, "it-girl" roommate.