Yukimura is working hard on his computer, as usual, when Himuro suddenly says, "I am in love with you. Her confession greatly shakes Yukimura. Unlike the last time, Himuro states her feelings matter-of-factly. Yukimura asks, "What theory did you use to determine that you love me?" Himuro replies by taking Yukimura out on a date and begins performing experiments they've done before such as measuring heart rates, using an emotion counter, collecting saliva, and the kiss experiment.
Whether a person loves someone is something 
they can decide for themselves, right?
سواء أحب شخصٌ شخصا ما هو أمر يقرّرانه بنفسيهما، صحيح؟
Ob man jemanden liebt oder nicht,
entscheidet man doch selbst, oder?
Cada persona decide si ama
o no a alguien, ¿verdad?
Cada persona decide si quiere
o no a alguien, ¿verdad?
Je croyais que c’était à chacun de nous
de décider si on est amoureux.
Una persona decide da sola
se ama o no qualcuno, giusto?
A decisão sobre amar ou não alguém
é tomada pela própria pessoa, certo?
Человек ведь сам определяет,
влюблён он или нет, так?