Incidentally, the manga scene that Pete mentioned back in April is from book 4, and takes place during the flight to Russia to acquire a rocket, immediately after Manami confronted Kio about Aoi’s feelings. The key difference from the anime is that he didn’t miss Manami’s point; he’s gone off alone to figure out what to do about his romantic entanglement with both Eris and Aoi, and Maya turns up just at the point where he needs advice from a grown-up.

(and almost certainly delivers better advice than he’d have gotten from Uncle Yuuichi…)

Given that volume 7 of the manga came out the same month that issue was released, either it has a lot of side stories, or they’re doing a more leisurely adaptation of the novels, or both.