Due to various circumstances, I am now a resident of another world.

I am a former Hero. ……I'm not a setting enthusiast, okay? Back when I was summoned as a hero to another world, I managed to form an alliance with the Demon Race. As a symbol of that alliance, I created a nation. There I became a king of sorts, and in the end I passed away while being watched over by my grandchildren—but when I came to, I found myself back in modern times, just before the hero summoning. However, just 15 minutes after returning, I ended up getting caught up in a classmate's hero summoning……