I Built a Nuclear Fusion Reactor Inside My Body!

In 2222, a nuclear explosion affected all mankind. The sun and the moon undergo great changes. And the disaster has just begun. Various living things undergo mutations due to nuclear radiation. Humanity has lost its dominance. Fortunately, under the research of the Human Federation, the method of practicing through the sun and moon was finally developed in 2250. The system of establishing special zones-gathering areas can finally survive this era of great catastrophe.