Atsushi and Kyouka convince Mushitaro to escape the vault with them. While making their escape the bank is surrounded by the Special Operations Division being led by Sakaguchi Ango, a member of the Seventh Agency.

Dazai instructs Atsushi to capture Sigma, who holds the key to stopping the Decay of the Angels' planned terrorist attack. Sigma, meanwhile, is hell-bent on protecting the Sky Casino.