The five new members of the Earth Defense Club are relaxing in the Kurotama Bath when they encounter Karls, first prince of Honyala Land. Karls wants to rule Earth in a "happy" way, and recruits the Earth Defense Club to help him -- by making them his personal knights!
Yeah! Because "happy" isn't 
something you search for!
!أجل! لأنّ "سعادة" ليست شيئاً تبحث عنه
¡Sí! ¡Ser feliz no es algo que buscas!
¡Sí! ¡Ser feliz no es algo que buscas!
Oui !
Sì! Perché l'HAPPY non è una cosa che si cerca!
É! Por que a felicidade não é
algo que precise procurar!
Да! Потому что счастье не надо искать!