This game's really beautiful and the music's really nice!!! I love the idea of soulmates not actually being soulmates, and the little dashes of humor within the game are great! That said, I have a few ideas on how to improve the story, and I hope that you don't take offense to these suggestions.
1. I definitely agree with another comment that the endless task assigning gets repetitive... And also, is there a purpose meant for the money that Kira earns by working?
2. I feel like sometimes the romantic plot is really inconsistent; I know that there's ultimately an "endgame" route with Robin but it feels really... rough, if that makes sense. I haven't played his route but I assume that everything would flow better if you just kept hanging out with him. However, if you don't, you get thrown into a weird mix of canon + chosen romance. Maybe work making the routes all canon in different ways (more work) or maybe more of a kinetic novel?