This is a strange one. It's some time after the end of humanity, and a war robot who shouldn't cooperate with humans is accompanying a human child who shouldn't exist, as they tour the desolate wartorn landscape of Earth in search of more surviving people.
The first volume was mostly setting up the characters and the mood, without getting far into the plot. There's a couple of episodes from their lives, including how the two first met; there are some really beautiful landscape shots which tell you a lot about the state of the world; there's just enough mystery there to make me intrigued; and by the end of the volume, there's even a third character.
The mood is a strange mix of very wholesome relationship between two completely different, well, people, juxtaposed with a world that feels anything but wholesome. The feeling of tragedy hangs in the air, but it never gets explained quite how it happened. The world itself feels broken down; as though the war against humans was what gave the others meaning, and now that it was won, there's nowhere to go anymore, just an eternal war over the remains of Earth.
I like it. I'm not sure how much I should steel myself against getting hit in the feels, though.