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."
Depending on the person, 
depending on the length of time, love...
...على حسب الشخص، على حسب المدة الزمنية، الحبّ
Je nach Personen und
der Länge der Beziehung nimmt
El amor tiene distintas formas
según la persona y el tiempo.
El amor tiene distintas formas
según la persona y el tiempo.
Selon les personnes
ou le temps qui s’écoule,
In base alla persona e alla durata, l'amore...
Dependendo da pessoa e do tempo,
У разных людей,
спустя разное количество времени,