[ Closing the cover of the book he'd been skimming and getting right into it is his way of agreeing. Though considering the topic, maybe it's a bit too calm of a mood for it. The fire is contributing to that. ]

My world is overrun by titans. Massive, deformed humanoids. The normal ones are about somewhere between seven and fifteen meters. Humanity created three giant, concentric walls one hundred years ago, and have been living inside them ever since... for protection. Most of us were eaten by them a long time ago.

[ But although their existence is probably pretty abnormal in itself, their abilities are more what he was thinking of. ]

Titans can regenerate their bodies when they're blown apart by cannons, or shot with rifles. They're incredibly hard to kill.