The theme of "concave-convex world" is not suitable for some young children. Children here are people who can't judge right from wrong.
Anyone who has seen the concave-convex world knows that the concave-convex world is cruel, and the qualification for survival is determined by fighting and strength. As long as you defeat the opposite enemy, you can continue to survive and rise in the ranking.
Brief introduction of concave-convex world;
The background of Concave-convex World is a universe created by the creator. There are many planets in the universe, and they can also communicate with each other through spacecraft. If it is placed in the sun, it may turn into Star Wars, and there may be high technology such as Gundam.
In this world created by the creator God, every planet has a different fate. Some planets are stable and prosperous, some people are enslaved, and some planets are dark all the year round.