Mecha: From the Start, the Goddess Publicly Forced a Proposal, Leaving the God King Stunned

[Mecha + supernatural abilities + dual transmigration + invincible + resisting alien invaders] In 2035, Blue Star fell, overrun by giant alien beasts. On the brink of death, Li Xuanji awakened the [Fate's Hand System] and opened a portal to a high-dimensional mecha plane. He casually used "Void Cloud-Grabbing Hand," hoping to steal a health pack to stay alive, but accidentally stole the personal token of the plane's strongest being, the "God King of Annihilation": the Annihilation Token! Carrying the token, he tumbled into a restricted area of the God King Academy and crashed beside the cold, beautiful princess Li Youyue. As the entire school seethed with murderous intent, Li Youyue stared at the token, gritting her teeth. "Stand down! He's the fiancé my father secretly chose for me." Thus began Li Xuanji's invincible path of "living off his wife while still calling the shots." On the surface, he was the God King's son-in-law; in truth, he had awakened the supreme dual-element powers of space and time, sweeping aside the geniuses of the inner world. When the alien motherships loomed over Blue Star and humanity fell into despair, Li Xuanji stood with his hands behind his back and opened a cross-dimensional passage. "Honey, come down and clear them out!" In an instant, god-tier battle maidens descended through the planes, and the alien civilization collapsed in unison. "Retreat! Why does this Blue Star human have a whole family of god-tier relatives?!"