Shirogane no Torikago: The Angels with Strange Wings

Two hundred years ago a great war almost wiped out mankind from the face of the Earth. Survivors of the war decided to start anew and slowly rebuilt the towns while relying on steam trains as a transportation to connect the towns around the globe. Over time, children with inexplicable new powers were born into this world. Afraid of anything they could not explain, people sent all such children to Roddo Town, a town isolated from the rest of the world by a great steel wall. It is also the town the game takes place in.