Sad that it pretty obviously got cancelled, but the ending, while rushed, is at least satisfying; that's more than I can say for some series that actually got a proper ending (looking at you, Reborn).
This was obviously axed because how rushed the ending is, tho still worth it. If this had 16 more chapters this could have been something very amazing, looking for author's next work.
Finally, a last chapter that doesn't feel rushed. Other than this, it seems like every final chapter of a manga was half-assed. For instance, Dagashi Kashi's.
If you can split Happy Prince into three, why cant you split it into 5? (with the mothers)
Or even a thousand split and share the curse with the rest of the humanity