Zero Zone: I Am the King of Bones, the Villain Behind the Scenes

[Original plot, no system, the protagonist is both good and evil, and all the girls want to have sex with him. Monsters are rampant and changes occur. This is the end of the world invaded by the mysterious disaster "The Hollow". The young man accidentally ended up here, lost in the void, and corroded by "etheric matter". But he did not lose his mind, but transformed into the strongest King of Eku. At the same time, he gained a special physique and was able to use the ether crystals that grew on his own. Create monsters and transform human bodies! The black snake picked up on the roadside was transformed into a five-clawed golden dragon that soared into the clouds and mist! The lizard caught in the corner was transformed into a Western dragon that destroyed the world! The cat that was hit by a car turned into a cute and clingy cat-eared girl! The big cock bought from the market turned into a trainee who loves singing and dancing! … Before you know it, his creations are filling every void! Be king and dominate inside!