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."
Oxytocin is primarily a hormone meant 
to stimulate breast milk production.
.الأوكسيتوسين هو هرمون يحفّز إنتاج الحليب من ثدي الأنثى
Die Hauptaufgabe von Oxytocin ist es,
die Brustmilchproduktion anzuregen.
L'ossitocina è un ormone che serve principalmente
a stimolare la produzione di latte materno.
A oxitocina, a princípio, é um hormônio feito
para estimular a produção de leite materno.
Первоочередная функция гормона
окситоцина — стимуляция лактации.