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."
Bittersweet youth has changed in flash 
to something that seems super dangerous!
حالة الشباب المتقلبة قد تغيّرت إلى أمر يبدو 
!خطيرا للغاية في لمح البصر
So eine bittersüße Jugend hat sich ruckzuck
als was Saugefährliches entpuppt!
¡Mi agridulce juventud
ahora luce muy peligrosa!
¡Mi agridulce juventud
ahora parece muy chunga!
L'agrodolce gioventù si è trasformata in un battibaleno
in qualcosa che sembra molto pericoloso!
Minha juventude agridoce do nada
se transformou em algo totalmente tenso!
Сладкая горечь юности вмиг
превратилась во что-то опасное!