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...?!
A kiss isn't something you should 
do just to be done with it.
.القبلة ليست امرًا تقوم به للانتهاء منه فحسب
Ein Kuss ist nichts, was man
so technisch abhaken sollte!
Un beso no es algo
que puedas hacer y ya.
Un beso no es algo
que puedas hacer sin más.
Un baiser,
ça ne se prend pas à la légère !
Un bacio non si dà così tanto per farlo.
Um beijo não deve
ser dado só por dar.
Поцелуй — это не какая-то там рутина!