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...
When I feel my heart racing... 
that kind of thing. Probably.
...عندما أشعر بقلبي وهو يتسارع 
هذا النوع من الأشياء على الأرجح
Wenn das Herz rast …
So was halt. Irgendwie.
Cuando se te acelera el corazón…
tal vez…
Cuando se te acelera el corazón…
tal vez…
Quando ho il batticuore... Queste cose. Credo.
Quando eu sinto meu coração
batendo forte... Acho.
Когда сердце бешено колотится... 
Как-то так.