Ibarada suggests that one of the greatest factors in the base conditions of romantic love is "whether or not you want to kiss the person," so Yukimura decides to try to kiss Himuro. However, Himuro doesn't like the idea of a kiss where the exact angle is measured with a protractor.  When Himuro realizes that if the mood were more like it had been in the Ferris wheel, she might not mind a kiss, she and Yukimura create an equation to numerically define "mood value." In what location might the "mood value" be highest? And will the two of them be able to kiss...?!
If it's gonna make you cry, 
don't conduct this kind of experiment.
إن كان هذا سيبكيك، فلا تقومي
 .بهذا النوع من التجارب
Wenn dich das belastet,
mach nicht solche Experimente!
Si vas a llorar,
no hagan este experimento.
Si vas a llorar,
no hagáis este experimento.
On arrête cette expérience,
si ça te fait du mal.
Se ti fanno piangere, 
non condurre esperimenti come questo.
Se vai chorar, melhor nem
fazer esse experimento.
Тебя же этот эксперимент 
до слёз доводит.