Hi hi hello hiii! I love the concept behind your story—I'm very much a sucker for this kind of relationship. I just wished the relationship between Sol and Luna was explored a bit more. While I was rooting for them, the chemistry between them felt a bit weak. An extra scene or two building on their relationship would help a lot, because it went by a little too fast. I understand it's supposed to be short, but the relationship was the main draw for me, and I wanted more of that!
I don't mind the story being a bit rough, but a transition between scenes would be nice. The time skips can be a bit jarring at times. Anyway, the UI is very cute and well-designed too, so good job with that!
I'm not sure if you wanted feedback on the endings so I'll hold off on that (let me know if you do), but I'm definitely looking forward to see Luna's side of things!