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."
Whether right or wrong, they refused to 
accept that they were unworthy of love.
سواءٌ كان الأمر صائبا أم خاطئا، رفضا تقبّل 
.كونهما لا يستحقان الحبّ
Ob richtig oder falsch, sie akzeptieren nicht,
dass sie der Liebe unwürdig waren.
Che avessimo ragione o no, si sono rifiutati
di accettare di non essere degni di amare.
Certo ou errado, eles se recusaram
a aceitar que não se amam.
Несмотря ни на что, они отказывались
смириться с тем, что недостойны любви.