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...
There's a part of my story where 
they end up on a deserted island.
In meiner Geschichte stranden
sie auf einer einsamen Insel.
Hay una parte en mi historia
donde acaban en una isla desierta.
Hay una parte en mi historia
donde acaban en una isla desierta.
Dans mon roman,
ils échouent sur une île déserte.
C'è una parte della mia storia
dove finiscono su un'isola deserta.
Tem uma parte da minha história 
onde eles acabam numa ilha deserta.
В книге у меня эпизод есть,
где герои туда попадают.