Opus 12: The Niji's Promise.After Hirato and Tsukitachi convince Akari to go with the plan to rescue Karoku, Gareki talks with Hirato about participating in this dangerous raid. Hirato later confirms that an encrypted transmission was sent from Airship Two by an unknown recipient. Going forward with their plan, Gareki and Yogi take over the security system of the Misty Mansion, while the rest of Circus move out to infiltrate. While Kiichi takes on Kagiri and Kiharu in the hallway, Gareki and Yogi battle Delmen and the insect-like Varugas in the forest. Tsukumo and Eva break into the mansion just as Eliška and Uro are waiting by Karoku's room. After Uro sends Eliška to her room, both Tsukumo and Eva engage in combat against Uro outside the mansion, though Uro tries to escape into the forest. Akari catches Azana deleting data from the computer, as Azana exhibits an inferiority complex and tries to convince Akari to switch over to Kafka as the superior organization. Nai and Jiki leave the roof of the mansion and hover over the forest. Nai remembers when he was a Niji as he spent time with Karoku. Nai reaches for the sky, where the forest opens a rainbow gate.