There is a decent handful of these "super-overpowered individual in a modern world with dungeons get outed when they are unknowingly livestreamed" stories.
This one at least is willing to lay it out straight with a simple reason, and doesn't appear to be trying to turn it into a romantic comedy or harem novel.
I suspect the author wanted to write more but wasn't allowed to. Still, we got a proper closure for this series. I don't know if this is popular enough for JNC to consider licensing, especially with a completed fan translation, but one can always hope.