It was nice, I was hoping in something a little more in the last chapter but still fine.
The author was even able to respect the idea of the 100 days story progression, I don't think there were much if any chapters that were covering the same day.
I say this because the 100 days manga from Hayate the combat butler mangaka was badly delivered with a lot of chapters being the same day, I think a little less than half chapters from that one go against the original concept, and some are wasted with single panels or lazy writing.
Jumping on the genre just because is popular after someone else made it spread and not because you have a story to tell shows fast.