Itsuki, Nayuta, and Miyako have a hard time dealing with the cold and head down to Okinawa. The next day, they visit a remote island so Itsuki can do some research and Nayuta decides to flail around naked in the water. Miyako is awed by what she's seeing and eventually jumps into the water naked, as well. Two days later, Itsuki is invited by his illustrator to go to Hokkaido, where they try various local cuisines. However, Itsuki finds out that Setsuna had been ignoring a deadline...
I guess it's no surprise that 
the water's actually cold.
Uh, das Wasser ist aber
doch ganz schön kalt.
Supongo que es normal
que el agua esté fría.
Supongo que es normal
que el agua esté fría.
Forcément, l’eau est glacée !
L'acqua è proprio fredda,
c'era da aspettarselo!
Não é surpresa nenhuma
 que a água esteja fria.
А водичка холодная, зима всё-таки.