"The Secret Place" is a unique chapter themed around Navigation 39 and takes place between episodes 5 and 6 of Aria the Origination. In this episode, Akari and President Aria explore the eastern section of Neo-Venezia, accompanied by Akatsuki who eagerly anticipates meeting Akari. Their journey leads them to St. Mark's Basilica, where Akari reveals her clandestine retreat, eventually discovered by Aika, Alice, and Akatsuki.