社員が次々と憑依され、無数のホラーの巣窟と化したオフィスビル。異例の事態に道外流牙(栗山航)、コヨリ(中澤実子)、ムツギ(黒谷友香)、そしてアゴラの三剣士が集結する。ホラーを外に逃がしてはならない。イグス(朝香賢徹)の指示でビルに結界を張ろうとするムツギを引き留めたのは流牙だった。「今あいつを蚊帳の外に置いてはならない。この街には創磨が必要だ！」ひとり葛藤する白羽創磨(仲野温)が下す決断とは・・・？
An office building that has turned into a hive of countless Horrors as employees are possessed one by one. Ryuga Dougai, Koyori, Mutsugi, and the Three Swordsmen of Agora gather to address the unusual situation. Do not let the Horrors get out. It was Ryuga who stopped Mutsugi, who was about to place a ward on the building under the direction of Igusu. "We can't leave him out of the loop right now. This city needs Souma!" What decision does Souma Shirahane, who is struggling alone, make?
