Chise and the others are clueless about what to do with their club. Trying to get suggestions from fellow classmates, they received only one reply asking what the "Stray Cats Appreciation Society" is. Nozomi and Chise suggests that the world needs to know more about their club. Ieyasu proposes an idea of a promotional movie and pushes a tight schedule to film all the scenes, tiring Takumi. Through many hardships including Chise and Fumino's dispute regarding music and extreme filming sites such as the top of Mount Everest, the final product was a success. However, due to Ieyasu's galge style, most of hardwork did not appear in the final product, angering Fumino and Chise.
紆余曲折はあったが、いよいよ活動を開始した「迷い猫同好会」。
その初代会長を自認する千世は、同好会の名を広く世界に知らしめるため、プロモーションビデオの制作を決定する。キーワードは「ワールドワイド」。
家康を監督に開始されたビデオ制作のロケ地は、そのコンセプト通り、日本だけに留まらず世界中を飛び回ることに。過密スケジュールと音楽制作を依頼された文乃と千世 の不和。
そんな中で、とある事件が彼らに襲いかかり……。
