The Flintlock Gunner of the Earth Immortal Realm

The class monitor transmigrated ten years ago, and has already spent three thousand six hundred and fifty years here. Does that mean one day on Earth equals one year here?

Hmm...

This feels familiar. Wait, let me shoot the person trying to kill me first, then I'll think about why.

Let me think, should I use a sniper rifle or an assault rifle for this fight?

Why is he in my scope?!

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.