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."
Hormones and the exact amounts of secretion 
in the brain comprise one element of love.
الهرمونات وكمية الإفراز المحددة في الدماغ
 .تمثّل عاملا واحد للحبّ
Hormone und die exakte
Menge der Ausschüttungen
Las hormonas y la composición
química del cerebro,
Las hormonas y la composición
química del cerebro,
Gli ormoni e le quantità esatte di secrezioni
nel cervello costituiscono un elemento dell'amore.
Hormônios e seu nível de produção no cérebro
são um dos elementos do amor.
Гормоны, выделяемые головным мозгом