Boy I really like what's out of this so far! I think I need to reread all the chapters again before I make a longer post about this, but even though nobody's outright said, "I'm gay and I wanna fuck this girl" it sure feels a lot more about being gay than like any other subtext type of series that I've seen. Like nothing's been said outright, but it feels like the author is super clear on yes, these girls are obviously gay for each other, it's just that the girls themselves are still confused.
And it's funny cuz it's taking some of the oldest class-s tropes in the book, "cool senpai who's good at everything plz notice me!!!" but then undercutting most of it. Senpai isn't actually that cool, and also they're in a mixed-gender school. Even that boy was like, "Hey if you have a crush on her just join her club!", and if the girls wanted to go flirting with boys, well, they're right there, and there's other girls doing exactly that.
Also the dads super seem like they're picking up on what's going on. They both get that amused parental expression, and drop subtle lines about how they're supportive of their "friendship."