Though Yukimura and Himuro went as far as to kiss for the experiment, they were soundly beaten by Chris and Suiu's oxytocin levels in their saliva. Panicked, Yukimura suggests that they conduct control experiments. However, in the midst of the Yukimura/Suiu pairing, Suiu's seductive manner ends up causing Yukimura to ogle her charms. Seeing that, Himuro runs another experiment with Yukimura, but ends up sulking. The two end up having a lover's quarrel. Yukimura's behavior causes Chris to look down at him coldly and say, "As a man, you are a failure."
There's too great a gap 
between us and that couple.
.هنالك فجوة هائلة ما بيننا وذلك الزوج
Zwischen diesem Pärchen
und uns liegen Welten.
Nuestra diferencia con ellos es enorme.
Nuestra diferencia con ellos es enorme.
L’écart est simplement trop grand.
Il dislivello tra noi e quella coppia è troppo grande.
Nem chegamos perto daquele casal.
Слишком большая разница между нами.