Looks like volume 9 might get 5 episodes according to the supposed future episode titles.
- 7话 されど、その部屋は终わらぬ日常を演じ続ける (Chapter 0 Title) Chapters 3-5
- 8话 それでも、比企谷八幡は (Chapter 6 Title) Chapter 6-7
- 9话 そして、雪ノ下雪乃は (Chapter 8 Title) Chapter 8
- If I get this right, Feel is literally based incarnate. Full episode for that scene. My heart boner is full of expectations.
- 10话 それぞれの掌の中の灯が照らすもの (Chapter 10 Title) Chapters 9-10, officially ending the volume
- 11-13话 Pretty much the big question here. Either volume 10, original, or adapting those special novels that Watari wrote for the BD releases.