At Binan High School in the city of Binan, Japan, Yufuin En and Kinugawa Atsushi, along with along with Naruko Io and Zaou Ryuu, enjoy leisurely high school lives while hosting meetings of a do-nothing club called the Earth Defense Club.
When that happens, 
just hit up the Kurotama Bath!
Wenn das passiert, müsst ihr im
Kurotama-Bad vorbeischauen!
¡Cuando pasa eso, hay que 
ir a los Baños Kurotama!
¡Cuando pasa eso, hay que 
ir a los Baños Kurotama!
Venez aux bains Kurotama !
Quando è così, potete venire ai bagni Kurotama!
Quando isso acontece, vocês devem
 ir à Casa de Banho Kurotama!