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 wish you'd come home 
once in a while, Nii-san.
Schau doch auch mal
wieder zu Hause vorbei.
Ojalá vinieras a casa de vez en cuando.
Ojalá vinieras a casa de vez en cuando.
Tu devrais passer
à la maison, des fois.
Comunque potresti passare da casa ogni tanto.
Queria que você fosse em casa
 de vez em quando, Nii-san.
Зашёл бы и ты к нам в гости…