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...?!
and if it gets much darker, 
the points drop drastically, bear.
وإن أصبح المكان أكثر ظلامًا، ستنقص
 .القيمة بشكل جذريّ، دبّ
Und wenn’s hart dunkel wird,
sackt der Wert böse ab.
y si se hace más oscuro,
baja muchísimo.
y si se hace más oscuro,
baja muchísimo.
En dessous,
le score diminue rapidement.
e se si fa molto più buio,
il punteggio diminuisce drasticamente, orso.
e se fica mais urscuro, os pontos
vão ficando cada vez piores.
и при снижении освещённости индекс 
будет уменьшатся, мишка.