Principal Kuma Kocho has sent the IChu on a summer vacation as a present. Each of them set out to make the most of their vacation on a private beach reserved just for them, but Mutsuki seems unhappy somehow. Then, one by one, people start going missing... The IChu that are left find a mansion deep in the forest and head inside to search for their friends.
Then let's prank them with 
everything we've got! Let's go!
!فلنقم بعمل مقلب لهم بكلّ ما لدينا! هيّا بنا
Dann lasst uns ihnen mit allen Mitteln
Streiche spielen. Ans Werk!
¡Entonces, vamos
a hacer travesuras! Let's go!
¡Entonces, vamos
a hacer travesuras! Let's go!
Bon, c’est parti pour les farces !
Allora facciamo loro uno scherzo coi fiocchi!
Então é hora de fazer pegadinhas
com vontade! Vamos lá!
Тогда устроим розыгрыш! За дело!