One day, a gifted graduate student in Saitama University's science department, Himuro Ayame, confesses her feelings to Yukimura Shinya. However, as neither of them have any experience with romance, they are worried as to whether it truly is love or not. They decide to discover "the standard conditions of love" so that they can judge each other's feelings by them. Even as their underclassman in the lab, Kanade, throws up her hands in exasperation, Yukimura and Himuro attempt to quantitatively measure "thrilling palpitations of love" by taking their heart rates while performing actions such as "kabedon," "chin-lift," and "sleeve-roll," but...
If during the second experiment 
my heart races again,
إن تزايد معدّل نبضات قلبي خلال 
،التجربة الثانية مجدّدًا
Wenn während des zweiten
Experiments mein Herz erneut rast,
Si mi corazón se acelera de nuevo,
Si mi corazón se acelera de nuevo,
Imaginons
que le phénomène se répète,
Se durante il secondo esperimento
avrò ancora il batticuore,
Se no segundo experimento
o ritmo acelerar novamente,
Если во второй раз пульс 
снова увеличится,