Isn't she adorable ? Can't imagine a city in Gensokyu though, at least not near to the mansion.

Could be a danmaku battle instead of city lights.

The total number of lights isn't all that huge. Maybe Kanako finally got the Human Village wired for electricity, or maybe they're having a late night festival with a lot of lanterns.

I take it that you people never played the touhou mod for Crusader Kings 2. There's a whole city in the basement.