I read an ebook of this.
At the end of Volume 22 things were looking up massively. The story had completely drawn me back in and I was so excited for this volume. At the end of the last book, we were introduced to a mysterious character named Moonlite Mask, who distracts the Evangelists in their mission to take out a battered Company 8. We soon find out this mysterious new figure is Beni who rescues Company 8 and takes them back to Asakusa for medical attention and to regroup. While the death of Captain Burns has led to Company 8 being even further ostracised by the Empire, other company captains begin to declare their belief in Company 8. While they regroup, Hibana returns to the grounds of the Convent she and Iris grew up in, to get to the end of the mystery of the Doppelgangers. She and the new leaders of Company 1 find a hidden underground library where Hibana finds out not everything from her past is as it seemed and she is confronted by a figure from her past.
This volume fell flat for me because it felt like after a whole bunch of volumes with very little filler, the filler came back. Val, Yu, Lisa and Arthur set out on a quest to re-encourage Arthur after his loss against the Dragon. They go on a hunt for a legendary metal (a quest fully fabricated by Val) but when Arthur misreads a clue and takes them into the Nether once more, they face something completely unexpected: Arthur's estranged family.
I hope this all adds up to something in the coming volumes, I'm not sure I can handle much more filler. The whole Arthur and his family storyline is completely unhinged.