Kai reincarnates into a new world, he finds that he has a system that allows him to be the strongest and after that, can call his older sister in his old world. Because it's boring to only have one woman. He tried to make his own harem.
Kai reincarnates into a new world, he finds that he has a system that allows him to be the strongest and after that, can call his older sister in his old world. Because it's boring to only have one woman. He tried to make his own harem.