One hot summer day, the 4 girls and Haruko are playing in the pool. They notice that Pets is missing. Kana later hears from her classmate Aida that Pet's family is very rich and they are moving to Mars. 
We've been together a long time!
Wir waren immer zusammen.
Siempre estuvimos juntas.
Siempre estuvimos juntas.
On a toujours été ensemble !
Lo siamo da tanto tempo.
Estamos juntas há tanto tempo!
Мы всю жизнь были вместе!