It's weird. I really loved this chapter - but have at best kinda enjoyed the other ones. Like, take the general premise of the manga with the specifics of this chapter and it could be an excellent little Friendship Piece about not judging someone just because you happen to be rivals. It's a...
This is one of those series where I won't mind even if they'll never fly the Yuri-flag. Their relationship is cute enough on its own even without romance.
On the one hand I know Amano is going to win, what with being the actual main character and all, and for what it's worth I don't dislike the two of them together.
On the other hand I love the chemistry he has with Fujishiro. These last few arcs could've been an excellent love story on their own...
For me I absolutely think it's Miori who's the weak link. The other two are weirdos, sure, but Miori is much creepier in my eyes with her child-loving tendencies.