I was finally able to watch Extra Chorus thanks to a fellow fan doing the effort to make fan subs (awesome man), and my thoughts?
It was refreshing, solum, humorous, heartwarming, and inspiring in some ways too. (The ending sequence and blushing Shiki? That’s icing on the cake.) I got almost everything I wanted, and the stuff I wanted is sure to be in the full film.
If you haven’t seen Extra Chorus because you think it’s insignificant compared to Mirai Fukuin, change your mind, because it’s definitely worthy of the series.