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."
I can't! Once Sui gets like 
that, she's invincible!
!لا أستطيع! عندما تصبح سوي هكذا فهي لا تقهر
Geht nicht! Sobald Sui so drauf ist,
hält sie niemand mehr auf!
¡Imposible! ¡Cuando Suiu
se pone así, nadie la para!
¡Imposible! ¡Cuando Suiu
se pone así, es imparable!
Impossible ! Quand elle est comme ça,
personne ne l’arrête !
Non posso! Quando Sui entra
in quella modalità, diventa invincibile!
Não dá! Quando fica assim,
a Sui fica invencível!
Не могу! В таком состоянии Суи
вообще ничем не проймёшь!