It's as good as any episode in the first season. This OVA focuses on the students who didn't pass the auditions, especially Hazuki, the main character here. We see what they were up to while the main band practiced, things like choosing their group's name and making the presents they gave to the band in the last episode. At first, I thought it would just be a light episode with some cute interactions, which would already be pretty satisfying for me. But there were many touching scenes with Hazuki, Shuichi and Natsuki that were great combined with the beautiful visuals. It also shows Taki-sensei supporting this group, which was missing from the first season, when it felt they were just abandoned.
The animation is top-notch, just like in the first season and anything created by Kyoani, it's enjoyable to watch even when there's not much happening becaue it's so beautiful. They used the same opening and ending, and again the OST is really good and complements each scene exquisitely. Recommend it to anyone who enjoyed the first season. I think this completes the series well and it's not just a useless filler. And especially to see more about Hazuki, considering this is probably the last time she receives the spotlight, since she was not a main character anymore in the sequel. For just an additional episode, it was a lot better than I expected.
