Who was Alphas owner, and why was he never shown? what even happened to him? he wrote 2 cards to Alpha with some gifts, then kind of died, did they ever meet again? well of course not, he probably is already dead like half the cast by the moment the series end.
Why give her a pistol that was never used? the world is extremely peaceful and there was never any danger whatsoever, other than the weather.
What/who was the Misago? we know she is not a robot because we were told she existed for years before the times of the robots, but what is she!? even more what was her role in the story? what was the point of having her there, as a character, she just randomly appears to kids, and eats some fish here and there... and no she was not the one mentioned by Sensei, because Monitor Alpha also likes to go around naked every now and then.
What are the water gods/ mushroom people? and why can't they be touched? why do they have human faces?
What were the mushroom buildings?
Who was Ayase's boss? what is their role other than taking care of the kamas? they are explorers but Ayase never makes any progress, hell Alpha had as much succes as him while doing her own adventure, really Ayase's character was the best vessel to explain the world, and yet nothing happened.
Will Monitor Alpha ever reunite with her sisters?
Why was Nai the only male robot? Hell did Nai even manage to keep living?
Did Alpha and Kokone took Gramps offer to move into the gas station after his dead in order to avoid the rising sea? and if not, how come her house was the only one unfazed by the rising sea?
Did the Owner of the Tea shop ever confess to Kokone? i guess this one doesn't matter much since she ended living with Alpha, talking about relationships, did Kokone's friend got back with her boyfriend?
And finally Maruko ends working at the shop were Alpha buys her coffee, but i feel this could have been expanded further, she could have gone with Alpha and Kokone too, this makes it feel like it god axed, that last bonus chapter could have at least shown us the house one last time, so why didn't the author?
Really now i loved the manga, it is a great slice of life, but i just hate it that the author mixed Sci-Fi on it, and then never explained or explored the world it made, i am not giving it less because at least he had the decency of dedicating 3 chapters with Sensei explaining part of how the A7 series was created.
I am just really conflicted with this series, and once again i am convinced that Slice of Life and Sci-fi just don't mix well together.