System’s perspective: I’m the System, and I’m freaking out right now. My villain Host and I just suffered a complete and utter failure, but it’s fine. We have a restart card, so we can start over.
After restarting, my Host will lose his memories. That’s fine too, because the System will tell him everything.
But once I’d finished explaining it all, he suddenly said, "You might have the wrong person. I’m not your Host."
I checked, and it turned out he really wasn’t. Although this body belongs to my Host, the soul inside it belongs to one of his mission targets, Ye Qiuyin, the protagonist.
System: Where’s my Host? Where did my Host go?
Meanwhile, inside Ye Qiuyin’s body, Yan Muyu fell into deep thought. Where’s my System? No, wait, is something missing from my body?
P.S. I’ve had two million-character novels reach completion and flop, so my track record is at least somewhat reassuring.
