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...
To contrast with the hypothesis we 
wish to put forth, hypothesis A,
،لكي نقارن الفرضيّة التي وضعناها، الفرضيّة أ
Gegenüber der Hypothese, die es
zu untersuchen gilt, Hypothese A,
Contraria a nuestra hipótesis,
la hipótesis A,
Contraria a nuestra hipótesis,
la hipótesis A,
Opposée à l’hypothèse A
que nous voudrions vérifier,
Ad opporsi all'ipotesi
che vogliamo proporre, l'ipotesi A,
Em contraste com a hipótese
que queremos seguir, a A,
Одновременно с предлагаемой нами 
гипотезой А