Hmmm...as much as I love this series, I feel like it just keeps repeating the same dynamic without actually taking the story any further. I mean, sure a lot of stuff has happened in the last 18 chapters since Oosawa learned Mitsuki was a girl, but has any of it really mattered? I mean, if you read the latest chapter, would you really even be able to tell anything had happened since like, chapter 27? I just feel like the author is diverging in too many side stories to try and avoid developing the main two's relationships, which is a little annoying and also makes me nervous because where we are now, it's not that hard to imagine the author announcing that the story was never meant to be romantic, and was just supposed to portray a friendship. Just how I've felt lately reading the newest updates, idk.
In my opinion, yes, a lot happened since 27, info that is important and really matter; and is because of something we/Narita/Aya were asking for a while, even before Aya discovered Koga is a girl: "why she dont show herself at school how she really is". If someone just stops at 27 and tries to spoil themselfs (hi me, 100% of the times haha) and just jumps at the last chapter, wouldn't know all this, why Koga acts like this. And at my point of view, is really important in their relationship, is to really got to know the person who u call friend (u are interested in); if not, is how Aya was feeling; "it's is just a stranger".
So in conclusion~ for me the side stories are not really full side stories, beacause all make sense since it directs the attention to this, plus it's gives lifes to secondary characters, something I really appreciate, since in romance mangas normally is full couple and looks like family or friends doesn't exist hahaha