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 saw something about salmon 
spawning on TV before,
Ich hab neulich in der Glotze was
über Lachse und Laichen gesehen …
Hace tiempo vi en televisión
sobre que los salmones
Hace tiempo vi un documental
sobre que los salmones
J’ai vu la reproduction
des saumons à la télé,
Mi ricordo di un documentario
sui salmoni in TV,
Eu vi algo sobre a desova 
dos salmões na TV uma vez,
Я тут по ТВ видал нерест лосося!