The appeal lies in the power fantasy it offers. You get to envision yourself ruling and shaping a world as you wish. Also, the art style and story development are usually top-notch.
Well, in chapter 1 of 'A World That I Rule' manga, the setting and the initial conflict are established. The protagonist finds themselves in a strange situation and starts to realize the extent of their power over this new world. There are also some mysterious characters introduced that add to the intrigue.
Updates for manga can vary. You might want to check the official website or the publisher's announcements for the most accurate and up-to-date information.