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."
So we really don't love each other. 
Is that what this means?
نحن لا نحب بعضنا إذا. أهذا ما تعنيه النتائج؟
Wir lieben einander also tatsächlich nicht?
Soll ich auf diesen Schluss kommen?
Entonces, ¿eso significa
que no nos amamos, después de todo?
Entonces, ¿eso significa
que al final no nos amamos?
Quindi non ci amiamo. È questo che significa?
Então a gente realmente não se ama?
Выходит, мы всё-таки
не любим друг друга. Так, что ли?