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."
then serotonin numbers may 
have some influence, as well.
.فقد تكون لمستويات السيروتونين بعض التأثير أيضا
dann sollten auch die Serotonin-Werte
einen Einfluss darauf haben.
la serotonina también podría influir.
la serotonina también podría influir.
je parie que la sérotonine…
allora anche i valori di serotonina
potrebbero avere una qualche influenza.
os índices de serotonina
também devem influenciar.
то уровень серотонина тоже
оказывает определённое влияние.