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"...
which pulls the wings upwards. 
It's the most common way of thinking about it.
ممّا يؤدّي إلى رفع الأجنحة إلى الأعلى. إنها أكثر طريقة 
.معروفة للتفكير في الأمر
Was die Flügel dann aufwärts treibt.
So könnte man es einfach sagen.
Le théorème de Bernoulli
est l’explication la plus courante.
che tira le ali verso l'alto.
È il modo più comune di pensarla.
o que empurra a asa para cima.
É a forma mais comum de se pensar nisso.
что и обеспечит возникновение 
подъёмной силы крыла.