Kiniro Mosaic is feeling more and more yuri as episodes pop up.
Not really. It's merely cute subtext, because there's 0 male characters. The only one I can remember is Alice's father in the 1st ep.
The only thing we may be able to see is Aya and Kyouko holding hands, but I wouldn't hold my breath.
The characters are particularly childish for high schoolers (or even the teachers for that matter).