Today is the school’s Cultural Festival. 
Yuu-chan is concerned how short her skirt is for the café’s costume.
The four girls, wearing the same costume, are ready to open their café, “Cat’s Tail.”
While the girls are busy with customers, Mai-chan shows up in their café...
It's for the event...
...هذا من أجل المهرجان
Das ist für das Event.
Me lo puse por el evento.
Me lo puse por el evento.
C’est pour la fête.
È per l'evento.
É porque é um evento.