Why is my Harem World a Yandere Nightmare

Alex, a reincarnator who has reincarnated enough times that he has enough contribution piled up to create his own world. Following his desires, the world he creates is one filled with his dreams only to realize that this might have not gone in the way he expected it to. Due to some unknown circumstances, he is now being chased by the same girls who avoided him earlier? Why are the girls who were avoiding him are now after him? Why is his sister now undressing while staring intensely at him? Why is Alex suddenly so popular now? Alex, who wished to be popular in this world he created is now being overwhelmed by his own popularity. What's wrong with this world?(This is not my work, a reference to the author in the first chapter)