This is supposed to be related to Kurayukaba, but I fail to see a good connection. The only similarity seems to be that both shows are related to underground, but that's it. This one is also much slower in terms of pacing (which made it a bit boring for most of the time, to be honest), but still suffers from the same problem as Kurayukaba: it does not properly explore the world or the characters. I want to know more about this world (or 2 worlds, if they are really separate), but there is barely any information. And yes, both movies are good at telling the story without words, but what they are telling is often not enough.
