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[sympathy + no female competition + no internal friction + strong love for each other + HE + heroine straightens the earth] After Aya looked at Ayao's technology tree, she felt a little disgusted. Aya asked Ayao: I thought you were the hero fighting the dragon, how come you became the hero fighting the bug? Ah Yao replied: I want to keep the bad guys who were infected by the swarm and hurt you. Aya objected: It's too disgusting, don't do this. Ah Yao secretly infected the bad guys into ugly bug-men. After Aya's death, she was bound to the high-dimensional technology tree and reborn with Ayao to the end of the world 20 years later: alien species are rampant and the earth is bent. The boy next door, Ah Yao, who is in love with Aya, uses his own technology tree to assist Aya. G-particle armor, automatic energy refining, high-dimensional warriors, phase energy transmission, and X-metal fortress. She uses the technology tree to unite kind people, annihilate alien creatures, and kill through the three realms of the surface, Moho, and mantle. Ayao gradually became Aya's shadow power. As for Aya, just unite and be kind and move towards the light.