The village revitalization with high modern knowledge?

Youth Adventure be a village lifesaver on the verge of collapse in a different world.

Web novel description: I was mountain climbing in Japan, and when I noticed, the view that spread before me was a strange one. A villainous Lord and a rural village at the brink of destruction filled with children. But those children have no way to oppose, so I guess I will save this village as thanks for them accepting me.