For some reason I always love this kinda story where it seems like a character is about to deliver some devastating news and it turns out to be something like "honey, I really need you to piss on me". Idk, it's jarring in a cute way kinda
I do think it's very funny that Mizuki is all like "oH DOOM AND GLOOM FOR WE CANAUGHT BE TOGETHER TRULY I HAVETH A SECRET MOST FOUL" and Nana is just like "you have a piss fetish it's fine, I love you and I don't mind giving you what you want"
I think that pretty clearly answers people's questions about Kyouko above. I think it's important to remember that they're still teens and figuring this out. It's not a bad thing for Kyouko to take some time and figure out how she feels. Just because Miku figured it out years before doesn't mean Kyouko is slow or has to move at the same pace.