To The Kingdom Of Cats ... (その 猫たちの王国へ ..., Sono Nekotachi no Ōkoku e ...) is the twentieth episode of the Aria anime and the seventh episode of the second season.
Summary[]
During practice, Akari, Alice, and Aika see President Aria traveling in his own boat, and follow him to a channel that's usually gated off before stopping because Alice has to leave for school. That evening, Akari tells Alicia she had a feeling they shouldn't have followed him further. Alicia mentions the Manhome legend of a kingdom of the cats, which humans can't enter, which reminds Akari of how Cait Sith stopped her and Ai during the Carnevale.
The next day, while Alice practices with two Pairs she met at the Orange Planet party, Akari and Aika see President Aria again and follow him, and this time continue past the gate. They end up in a labyrinth of flooded buildings that has them traveling in circles while being watched by cats. When Akari apologizes for trying to enter their domain, President Aria appears and shows them the way out. As they leave, Akari looks back and sees the building filled with cats, including Cait Sith, who bows to her.