Rekkyou Sensen

Story:

The year is 2206 - due to environmental pollution and resource depletion, the Earth's habitable period is approaching 100 years. Meanwhile, in order to ensure the survival of humanity and reduce the world's population, a war called the "National Ruin Tournament" is decided to be held to select countries for annihilation! The representatives of their countries are boys and girls with superhuman abilities, hailed as the strongest. The "National Ruin Tournament," a tournament of heroes with the fate of their nations on their shoulders, has begun!