Neotopia Color Manga #1

In a world where Man has at long last learned to live and work in harmony with Nature, the citizens of Mathenia live a good life under their beloved Grand Duchess. Unknown to them, she is Nalyn, a commoner standing in for Nydia, the real Duchess. Doing Nydia's dirty work is tough enough, but then Nalyn is kidnapped by an enemy empire bent on bringing back the age of world-hurting technological excess. And once rescued, she must then lead her country to war.