I know nobody really cares for this manga, so just gonna leave my thoughts here for them for myself...
Abstract ideas when well portrayed in the form of short stories can really make you wonder about the essence of whatever that idea is trying to tell...
Unfortunately, while this series of short stories tries to do this same thing.
It fails.
There are a few good bits and reasonable themes. The Essense of "what is and what's not the right thing to do?" is touched upon. But that alone is not enough to tell a relevant story.
At first it tries to challenge the conventional norms and then the themes transition to a more realistic yet still fundamentally shallow message.
All in all, the core of every story is shallow, you won't find anything beyond the apparently superficial premise of each story, and even though these are all short stories, the respective characters act like aliens which in turn makes the already poor premise even worse.
In short, if you do decide to read these, don't go in expecting something even the least bit profound.