At the Okinawa training camp, Yukimura and Himuro shared a kiss of the highest theoretical value on a bridge of the greatest mood value under the beautiful, painterly rays of the morning sun. But the amount of saliva they collected was insufficient and so retesting is required. They head to the biological sciences' Regulation of Biological Systems Department to meet with a specialist in saliva testing. There, they find an alluring woman dressed like a traditional courtesan wearing a lab coat, Suiu, and her sweetheart, Chris. When Yukimura asks Suiu and Chris to help with their experiment to "give proof of love," Chris and Suiu flaunt their overwhelming aura of love.
Why not? After all, 
no one will be able to see us.
.لمَ لا؟ لن يتمكن أيّ شخص من رؤيتنا بعد كل شيء
Wieso nicht? Uns kann doch
niemand dabei beobachten.
¿Qué tiene de malo? Nadie nos verá.
¿Y qué importa? No nos van a ver.
Mais oui, ne t’inquiète pas.
Personne ne nous verra !
Perché no? Dopotutto, nessuno potrà vederci.
Claro. Ninguém vai ver, mesmo.
А почему нет? Ведь нас с тобой
всё равно никто не увидит.