In a certain era, a certain superpower nation, due to economic, political, and ideological reasons, proposed by a [brilliant] leader, built a [anti-fascist defense wall (antifaschistischer .Schutzwall)] in the capital of the occupied country, consisting of barbed wire, high-powered searchlights, electrified fences, land mines, trap-activated flares, electronic alarm systems, automatic shooting devices, and other modern facilities. In the end, the country that came up with the idea of building the wall and the satellite country that executed it were ruined.
In this world, it is not necessarily a hassle to isolate a nation's people with such a cumbersome facility, all it takes is to isolate one person. Building a wall high and thick enough could meet the demand. Be it real-life dangerous species, imaginary man-eating giants, or attacking Children's Group members, none could cross this 50-meter-high, 8-meter-thick wall. Naturally Roland, who stayed behind the wall, was safe.
