It's nearly a direct continuation of Imawa no Kuni no Alice.

Overall - if you decide to read this, you should read the former first to better understand what is happening.(the original 'prequel' is MUCH better as well, so trust me, if you won't like the former, don't even touch this one) Unlike the former, which went roundabout on most of the concepts - this one literally throws all the answers you might want at you.

It would be spoiling to tell how this relates to the first manga, but I will just tell that there will be some minor cameos and the overall concept of the 'borderlands' is quite similar.

But enough about the first story, let's get on with this one - if you are entering this in hopes of getting the same quality as previous series - abandon this hope.

This manga offers a pretty weak(but colorful and distinguishable) cast of characters, following a semi dull story.
The characters make 180 in their personality way too often.. the plot revolves around asspulls where characters do physically impossible things.
It was a minor issue in the original series, where it could pretty much be ignored, but in this one it's heavily magnified...

The only reason you might want to read this manga is if you need to be spoonfed the explanation of the concept behind the original series. This manga literally leaves no questions hanging. If anyone asked me for a manga series, where I literally did not have a single question left by the time I finished reading it - that would be one of the best examples.
And that's a negative point for me, but I can see that being helpful for some people who just want an 'absolute conclusion', which is what is offered here.

An overall weak 7/10. Art was pretty good, it had more or less good enjoyment value if you enjoyed the former series... despite weak character cast - they were still pretty memorable. Story was nothing much, but I have seen worse, so can't give it less than fair as well.