This OVA is so pretty!
If you have watched the first two seasons prior to watching this you will have seen that the character design has been changed a bit. They look all so mature and pretty here whereas they looked more "simple" but still pretty in the prior series.
The music is great as usual and the topic of this OVA is the anxiety of an unknown future. I simply love how this topic has been handled here. It's just full of general optimism and love.