This is the platonic ideal of a Webnovel series.
An ordinary highschool student spends 300 out of the past 100 years cultivating sword immortality one afternoon, and suddenly gets Isekai'd into a world where he's the most desirable man to ever exist. In this new world, women are like Pokemon - you beat them up and add them to your harem.
That's pretty much it. The consistency is about as solid as the illustrator's understanding of human anatomy. The author threw in elements of all the plot hashtags on the most popular series, but they kinda just hang awkwardly off to the side, not sure how to mingle with the rest. We're constantly told gender roles are reversed, and shown that everything still revolves around the belief that man is the default of personhood and women are a product for them to consume.
Don't take this to mean you shouldn't read it. If you follow more than one series on this app and you're looking for another, this is exactly what you want. Just understand that it's not good.