Tsubasa RESERVoir CHRoNiCLE - Season 1 Episode 18 : The Kitties and the Puppies 2006

It seems Syaoran and Kurogane had stolen the prey of two demon slayer partners Yuzuriha Nekoi and Kusanagi Shiyuu as they introduce themselves Kurogane discovers from them that Fay and had given him and Syaoran the aliases Big puppy and Little puppy. Back at the cafe they treat the partners to some cake and tea while Kurogane huffs at Fay for the names (he and Sakura are Big Kitty and Little Kitty). The partners get called out for a bounty so leave promising to come back and swap stories. Syaoran and Sakura have a momentary heart to heart when Sakura almost discovers that Syaoran was probably an important person to her, but because of Yuuko's work she instantly forgets her discovery. Syaoran and Kurogan go down to city hall to find out about any strange occurrences when they are directed to the information booth. They meet a woman by the name of Eeri at the info booth who tells that lately demon have been showing up in areas they shouldn't and of a new demon that's appeared that takes the shape of a beautiful woman. They receive an address to a place where to find more information. Kurogane and Fay follow the address when they are surrounded in the streets by a bunch of demon ready to attack.