Did I Transmigrate into the System of the Child of the Plane?

Have I transmigrated?

I haven't become an adult, reincarnated as an animal, or possessed a weapon or anything like that...

To be precise, I'm not even a living creature.

Me! A fine young man of the twenty-first century, a model citizen of the new era!

I've transmigrated into someone else's System, and we're bound to live or die together!

And my host is the Chosen One of the Plane, the sort who picks a fight with the strongest being right from the start!

"Hello, is this the Underworld? I'd like to reserve a spot. I'll be coming to reincarnate before long..."

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.