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."
When I think that I might not be able 
to drink you again, it's so scary!
،عندما أفكر أنني قد لا أتمكن من شربك مجددا
 .فالأمر يخفيني كثيرا
Allein der Gedanke, nicht mehr
trinken zu können, macht mir Angst!
Me da muchísimo miedo pensar
en no volver a beberte.
Me da muchísimo miedo pensar
en no volver a beberte.
J’ai si peur
que ce soit à sens unique.
Se penso che potrei non poterti più bere,
mi viene tanta paura!
Morro de medo só de pensar
que poderia ficar sem ela!
И представить страшно, что будет,
если я больше не смогу его пить!