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...?!
It might be an experiment, 
but it's my first, so...
...قد تكون هذه تجربة لكنها أوّل مرّة بالنسبة لي، لذا
Es mag ein Experiment sein,
aber es ist auch mein erstes Mal …
Será un experimento, pero es el primero.
Será un experimento, pero es el primero.
Sarà anche un esperimento,
ma è il mio primo bacio, quindi...
É um experimento,
mas seria minha primeira vez...
Это эксперимент, но и первый поцелуй...