At long last, it's the first day of the summer training camp. On the plane, Yukimura presses close to Himuro and tries to collect her saliva in spite of the surrounding gazes. Manga artist Yamamoto observes them with an eerie smile. On the beach in Okinawa, the midsummer sun shines down on Yukimura and Himuro in their swimsuits, and they immediately attempt to begin their close physical contact experiment. However, since they're doing it, they choose to seek "the position which offers two people having close physical contact the greatest contact area"...
is due to things like coral and shells 
turning into chalky white sand, right?
تعود إلى تحوّل المرجان وصدفات البحر 
إلى رملٍ أبيض طباشيري، صحيح؟
liegt an den Korallen und Muscheln,
die den Sand so weiß machen.
es por el coral y conchas
haciendo blanca la arena, ¿no?
es por el coral y las conchas
que hacen blanca la arena, ¿no?
est due au corail et aux coquillages
qui donnent le blanc du sable.
perché i coralli e le conchiglie si trasformano
in sabbia bianca calcarea, giusto?
coisas como corais e conchas que
se tornam areia branca. não é?
обусловлен белым песком на дне, 
образующимся из кораллов и раковин.