Wow, that was... a chapter. I can't even really call it an ending since we just kind of returned to square one. Kaoru accepts that Uta still (?) loves her, and at some point in the future they start living together again since it's something they both wanted but for some reason didn't until after Uta graduated, maybe. It just feels pointless after Uta goes on that monologue about not wanting anything to change and how her love was a mistake from the start.
Honestly the most off-putting this about this is the entire story surrounding Uta's parents and their dissolving family was completely kicked to the curb. It was supposed to be such a big deal that she was moving back with their problematic parents and maybe we'd get to see why she was such a depressed and distant kid but we never did. Instead months passed with no issues, her mom literally disappeared, and Uta never really left except when it was plot relevant so what was the point? We know more about Kaoru than we do Uta, other than her being a diligent person and stubborn about not wanting to move on.
I do think she's wearing the necklace Kaoru gave her in the beginning though, but as with a lot of things in this series the art just isn't as good as it was back then. Maybe as a sign that she'll never really let go of those feelings.
Overall I feel incredibly whatever about it. It ended terribly, but at least Konatsu came out happy. I would have preferred if she and Uta got together and they could both move on from their pasts and be happy together. Oh well.