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...?!
Now, as long as I tilt my head 
at an angle of 40 degrees,
،والآن، ما دمتُ سأميل رأسي بزاوية 40 درجة
Wenn ich nun meinen Kopf
auch um 40° anwinkle,
Mientras incline mi cabeza
un ángulo de 40 grados,
Mientras incline la cabeza
un ángulo de 40 grados,
Quant à moi,
si j’incline ma tête de 40 degrés,
Ora, se inclino la testa di 40 gradi,
Agora, se eu inclinar
minha cabeça em 40 graus...
И тогда, если я поверну голову 
на 40 градусов,