Surviving as an Abandoned Extra

Synopsis

I was trapped in the Tower with the protagonists of a clichéd fantasy novel.
As soon as I became useless, I was abandoned by them.
I was the extra they threw away without a second thought.
“Bastards. I swear I’ll block your path no matter what.”
Then, right before my eyes, the future villain appeared, consumed by malice.
“…What are you even picking up and eating this time?”
“Then what are you just standing there watching for? If you want to survive, eat too!”
“What the—mmph!”
I’ll raise you well, so let’s get along and survive our way out of here.
And after that, we can part ways coolly and go down our own paths.
Hmm, but…
“I’m a firm believer in staying single.”
“Don’t be ridiculous. You’ve got four kids clinging to you, and you say you’ll be single for life?”
Uh, excuse me, but your obsession wasn’t part of my plan?