After Defeating the Demon King, I Just Want a Peaceful Life

After defeating the Demon King and saving another world, the hero just wants to return to his own world and live a quiet life now that peace has been restored.

But why does he run into all kinds of trouble the moment he gets back?

A girl burdened with a “curse,” special affairs agents showing up at his door, a nonhuman child he picked up...

Why does every incident revolve around me? What happened to my quiet life?!

(This story is mostly slice of life and takes place in a fictional world. If anything seems unrealistic, just go with it!)