Ahhh.. I'm impressed with this series so far. It might be a bit heart crushing to read, but I feel like even if the end is bittersweet it will be satisfying in a way.
As much as I would love to see Uta with Kaoru, I can't deny I'd feel a little bad for the brother when he's done nothing wrong and genuinely cares for both his sister and wife. I also don't know if I'd be happy if they tried to throw in some drama where the brother did something terrible like cheating to get the main characters together, because that would feel like the cheap and "easy" way out with little satisfaction tbh. What I wouldn't mind seeing is if Kaoru actually fell in love with Uta, and fighting with her own emotions or something. Still, regardless of the route the author decides to go, I'm excited to read it to the end.
Oh, and is this series already finished or ongoing?