Becoming a god by raising witches

After traversing a mysterious world, Locke is bound to a witch-feeding system. Based on folk tales, neighborhood gossip, and various tabloids, he explores 54 times in search of the legendary witch, only to find that they are all rumors and that he is a fool.
Just when he was about to give up the search for the witch, he unexpectedly saw a job advertisement...
This book is also known as "I, the Witch Keeper," "I Really Didn't Want to Become an Evil God," and "After Becoming a God, I'm Surrounded by Witches."