Quote Originally Posted by Archangel View Post
... is this seriously going to be the final arc?
Its because we just entered Side Story territory. This is the TAMNI SS Novel that, chronogically, takes place between Novels 13 and 14. It introduces a few important characters plus the creation of Team GROUP.

Team GROUP:
Tsuchimikado
Accelerator
Fake Unabara Mitsuki
Musujime