I'm really enjoying the story so far.
In my opinion, and I can't accurately explain to you exactly how I know this, but I think that Satsuki doesn't have romantic feelings for Rika. I think it's more, "Damn, no matter how little I let him see of me, he still wants to be my friend. That's a first". Like, I think he may be neurodivergent or on the spectrum in general. I can relate in some ways, me being the queer middle child with ADHD and most likely other things. From my experience, making friends and, even more difficult, maintaining relationships are hard to do with people who aren't wired similarly as you. But, damn, when you find your people, it's a beautiful feeling. You start to learn more and improve yourself without even knowing it, just from someone willingly reaching out and being patient with you.
I do definitely have other thoughts on how the story can go, but for now until there is more development, I'll keep my views open and just enjoy the story. But yeah, that's what I think. Could be wrong, could be right, could be something else. No matter which way, this is a gorgeous story. Always glad to see more representation