And this is why it's going to get axed. It's okay to "subvert expectations," but this is a gooner manga; changing the tone is not going to get new readers.
Seeing Africa like that is making my brain hurt. Go to Google Maps, measure the distance of that Plateau to that Prague, and it's over 500 kms. The real Africa is huge.
Ah, the classic "she looks like a kid, but she's actually 1000 18 years old". After the first few pages, I expected a satisfying explanation, and it wasn't delivered...