Arknights: Invincible from the Moment I Land

(I'm not good at writing introductions, so please check out the story itself.) A young man from another world named Yun Xiu fell from the sky, crashed through the frozen wasteland of Ursus, and happened to save a white-haired girl named Alina. Then he learned that this place was called Terra, and that all his beloved waifus from the games were suffering.

"All right, no more pretending. I'll come clean."

He can bring anything he imagines into reality, making whatever he wants. Blades, guns, swords, halberds, aircraft, potions, even living things: it all depends on his mood. The principles? No idea. The structure? No idea. It just works, and he can even reverse-engineer things.

And so, a completely unreasonable troublemaker appeared on this land. The great empires were at their wits' end, the giant beasts were afraid of him, and the Infected worshipped him like a god. But the beautiful girls on Rhodes Island didn't see it that way. They had to be on guard at all times, because some pervert might sneak a touch of their bodies, feathers, tails, or horns at any moment.