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...
Himuro, upon what evidence did 
you determine that you love me?
هيمورو، بناءً على أيّ دليلٍ أيقنت أنك واقعة في حبّي؟
Himuro, aufgrund welcher Datenlage
deduziertest du eine Liebe mir gegenüber?
¿Cómo pruebas estar enamorada de mí?
¿Cómo demuestras estar enamorada de mí?
Quelles preuves as-tu
que tu m’aimes ?
Himuro, basandoti su quali prove 
hai stabilito di amarmi?
Himuro, sobre qual evidência
você definiu que gosta de mim?
Химуро, как ты определила, 
что влюблена в меня?